docs: Fix Typo (#908)

## What ❔

Simple one letter typo fixes to help me understand how GitHub works and
to contribute to ZkSync.
## Why ❔

To improve readability for users and beginners. Also a way for to me to
begin contributing to projects i care about and learn how to use GitHub.
<!-- Why are these changes done? What goal do they contribute to? What
are the principles behind them? -->
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iterators are in context about the evolution of repos. -->

## Checklist

<!-- Check your PR fulfills the following items. -->
<!-- For draft PRs check the boxes as you complete them. -->

- [ Y] PR title corresponds to the body of PR (we generate changelog
entries from PRs).
- [ Y] Tests for the changes have been added / updated.
- [ Y] Documentation comments have been added / updated.
- [ Y] Code has been formatted via `zk fmt` and `zk lint`.
- [ Y] Spellcheck has been run via `zk spellcheck`.

---------

Co-authored-by: Fedor Sakharov <[email protected]>

CONTRIBUTING.md

@@ -35,7 +35,7 @@ and suggestions here too. Some resources to help:
 
 1. [In-repo docs aimed at developers](docs)
 2. [zkSync Era docs!](https://era.zksync.io/docs/)
-3. Company links can be found in the [repo's readme](README.md)
+3. Company links can be found in the [repositories' readme](README.md)
 
 ## Code of Conduct
 

README.md

@@ -40,7 +40,7 @@ at your option.
 - [GitHub](https://github.com/matter-labs)
 - [ZK Credo](https://github.com/zksync/credo)
 - [Twitter](https://twitter.com/zksync)
-- [Twitter for Devs](https://twitter.com/zkSyncDevs)
+- [Twitter for Developers](https://twitter.com/zkSyncDevs)
 - [Discord](https://join.zksync.dev/)
 - [Mirror](https://zksync.mirror.xyz/)
 - [Youtube](https://www.youtube.com/@zkSync-era)

docs/guides/launch.md

@@ -1,6 +1,6 @@
 # Running the application
 
-This document covers common scenarios of launching zkSync applications set locally.
+This document covers common scenarios for launching zkSync applications set locally.
 
 ## Prerequisites
 

sdk/zksync-rs/README.md

@@ -1,4 +1,4 @@
 # Rust SDK for zkSync
 
-This SDK is currently under construction and is only used for internal needs. A public version of the SDK would be
+This SDK is currently under construction and is only used for internal needs. A public version of the SDK will be
 announced later.

sdk/zksync-rs/tests/unit.rs

@@ -338,7 +338,7 @@
 //                             eth_signature,
 //                             ..
 //                         })) => eth_signature.serialize_packed(),
-//                         _ => panic!("No ChangePubKey ethereum siganture"),
+//                         _ => panic!("No ChangePubKey ethereum signature"),
 //                     };
 //                     assert_eq!(&eth_signature[..], expected_eth_signature.as_slice());
 //                 }