chore(docs): Fix multiple grammar issues

packages/gatsby-cli/README.md

@@ -102,7 +102,7 @@ At the root of a Gatsby app run `gatsby build` to do a production build of a sit
 | `--open-tracing-config-file` | Tracer configuration file (OpenTracing compatible). See https://www.gatsbyjs.org/docs/performance-tracing/         |                               |
 | `--no-color`, `--no-colors`  | Disables colored terminal output                                                                                   |            `false`            |
 
-For prefixing paths, most will want to use the CLI flag (`gatsby build --prefix-paths`). For environments where you can't pass the --prefix-paths flag (ie Gatsby Cloud),the environment variable `PREFIX_PATHS` can be set to `true` to provide another way to prefix paths.
+For prefixing paths, most will want to use the CLI flag (`gatsby build --prefix-paths`). For environments where you can't pass the --prefix-paths flag (ie Gatsby Cloud), the environment variable `PREFIX_PATHS` can be set to `true` to provide another way to prefix paths.
 
 ### `serve`
 
@@ -117,7 +117,7 @@ At the root of a Gatsby app run `gatsby serve` to serve the production build of
 |  `-o`, `--open`  | Open the site in your (default) browser for you                                          |                               |
 | `--prefix-paths` | Serve site with link paths prefixed (if built with pathPrefix in your gatsby-config.js). | `env.PREFIX_PATHS` or `false` |
 
-For prefixing paths, most will want to use the CLI flag (`gatsby build --prefix-paths`). For environments where you can't pass the --prefix-paths flag (ie Gatsby Cloud),the environment variable `PREFIX_PATHS` can be set to `true` to provide another way to prefix paths.
+For prefixing paths, most will want to use the CLI flag (`gatsby build --prefix-paths`). For environments where you can't pass the --prefix-paths flag (ie Gatsby Cloud), the environment variable `PREFIX_PATHS` can be set to `true` to provide another way to prefix paths.
 
 ### `clean`
 

packages/gatsby-codemods/README.md

@@ -16,7 +16,7 @@ npx gatsby-codemods <codemod-name> <filepath>
 
 `filepath` is not required and will default to the directory you're currently in.
 
-Note that you cannot pass additional flags to this command. It will automatically run the codemod against file extenstions `js, jsx, ts, tsx` and ignore the `node_modules`, `.cache` and `public` directories of your project.
+Note that you cannot pass additional flags to this command. It will automatically run the codemod against file extensions `js, jsx, ts, tsx` and ignore the `node_modules`, `.cache` and `public` directories of your project.
 
 2. Use JSCodeshift directly
 

packages/gatsby-design-tokens/README.md

@@ -28,7 +28,7 @@ Gatsby's design tokens are following the [System UI Theme Specification](https:/
 
 - Minor fixes to tokens will be released as patch versions.
 - Major design changes will be released as minor versions
-- _Breaking_ public API changes will be released in a major versions only.
+- _Breaking_ public API changes will be released in major versions only.
 
 To prevent your site from breaking due to a breaking change or looking dramatically different due to a minor version bump, we recommend the [~](https://docs.npmjs.com/misc/semver#tilde-ranges-123-12-1) comparator when using this package.
 
@@ -182,7 +182,7 @@ Follow the [official guide](https://www.gatsbyjs.org/contributing/setting-up-you
 git clone https://github.com/gatsbyjs/gatsby.git
 cd gatsby
 
-# set up the repo,install dependencies for `packages`, and build the latter
+# set up the repo, install dependencies for `packages`, and build the latter
 yarn run bootstrap
 
 # make sure tests are passing

packages/gatsby-dev-cli/README.md

@@ -33,7 +33,7 @@ watchers to build Gatsby source code.
 
 ## Revert to current packages
 
-If you've recently run `gatsby-dev` your `node_modules` will be out of sync with current published packages. In order to undo this, you can remove the `node_modules` directory or run:
+If you've recently run `gatsby-dev` your `node_modules` will be out of sync with currently published packages. In order to undo this, you can remove the `node_modules` directory or run:
 
 ```shell
 git checkout package.json; yarn --force
@@ -47,7 +47,7 @@ git checkout package.json; npm install --force
 
 **[Demo Video](https://www.youtube.com/watch?v=D0SwX1MSuas)**
 
-More detailed instruction for setting up your Gatsby development environment can
+More detailed instructions for setting up your Gatsby development environment can
 be found [here](https://www.gatsbyjs.org/contributing/how-to-contribute/).
 
 ### Other commands
@@ -78,4 +78,4 @@ Copy all modules/files in the gatsby source repo in packages/
 
 #### `--force-install`
 
-Disables copying files into node_modules and forces usage of local npm repository.
+Disable copying files into node_modules and force usage of local npm repository.

packages/gatsby-plugin-gatsby-cloud/README.md

@@ -129,7 +129,7 @@ An asterix, `*`, will match anything that follows. i.e. `/packages/gatsby-plugin
 
 [HSTS Cheatsheet](https://cheatsheetseries.owasp.org/cheatsheets/HTTP_Strict_Transport_Security_Cheat_Sheet.html)
 
-Since this header is an opt-in security enhancement with permanent consequences we don't include it as a default feature but use can use the `allPagesHeaders` to include it.
+Since this header is an opt-in security enhancement with permanent consequences we don't include it as a default feature but use the `allPagesHeaders` to include it.
 
 ```javascript
 {