docs: fix missing scripts section

Without it, npm complains about it:
```
npm WARN publish npm auto-corrected some errors in your package.json when publishing.  Please run "npm pkg fix" to address these errors.
npm WARN publish errors corrected:
npm WARN publish Removed invalid "scripts"
```
via npm/cli#6918 it looks like this is not going to be fixed, thus the change, which removes the warnings

README.md

@@ -57,6 +57,7 @@ There are several steps done in a pipeline:
        bugs: {
          url: "https://github.com/username/repo/issues",
        },
+       scripts: {}
      },
      postBuild() {
        // steps to run after building and before running the tests