fix: typos and grammar (#1408)

Co-authored-by: arpitpandey0209 <[email protected]>

frontend/app_flowy/android/README.md

@@ -12,8 +12,8 @@ When compiling for android we need the following pre-requisites:
 - [Download](https://developer.android.com/ndk/downloads/) Android NDK version 24.
 - When downloading Android NDK you can get the compressed version as a standalone from the site.
     Or you can download it through [Android Studio](https://developer.android.com/studio).
-- After downloading the two you need to set the environment variables. For Windows that's a seperate process.
-    On MacOs and Linux the process is similar.
+- After downloading the two you need to set the environment variables. For Windows that's a separate process.
+    On macOS and Linux the process is similar.
 - The variables needed are '$ANDROID_NDK_HOME', this will point to where the NDK is located.
 ---
 
@@ -48,9 +48,9 @@ linker = "/home/user/Android/Sdk/ndk/24.0.8215888/toolchains/llvm/prebuilt/linux
 
 **Folder path: 'Android/Sdk/ndk/24.0.8215888/toolchains/llvm/prebuilt/linux-x86_64/lib64/clang/14.0.1/lib/linux'.**
 After that you have to copy this file into three different folders namely aarch64, arm, i386 and x86_64.
-We have to do this so we Android NDK can find clang on our system, if we used NDK 22 we wouldnt have to do this process.
-Though using NDK v22 will not give us alot of features to work with.
-This github [issue](https://github.com/fzyzcjy/flutter_rust_bridge/issues/419) explains the reason why we are doing this.
+We have to do this so we Android NDK can find clang on our system, if we used NDK 22 we wouldn't have to do this process.
+Though using NDK v22 will not give us a lot of features to work with.
+This GitHub [issue](https://github.com/fzyzcjy/flutter_rust_bridge/issues/419) explains the reason why we are doing this.
 
  ---
 

frontend/app_flowy/packages/appflowy_editor/README.md

@@ -38,7 +38,7 @@ and the Flutter guide for
   * shortcut events
   * themes
   * menu options (**coming soon!**)
-* [Test-coverage](https://github.com/AppFlowy-IO/AppFlowy/blob/main/frontend/app_flowy/packages/appflowy_editor/documentation/testing.md) and on-going maintenance by AppFlowy's core team and community of more than 1,000 builders
+* [Test-coverage](https://github.com/AppFlowy-IO/AppFlowy/blob/main/frontend/app_flowy/packages/appflowy_editor/documentation/testing.md) and ongoing maintenance by AppFlowy's core team and community of more than 1,000 builders
 
 ## Getting Started
 
@@ -117,7 +117,7 @@ Below are some examples of shortcut event customizations:
 Please refer to the API documentation.
 
 ## Contributing
-Contributions are what make the open source community such an amazing place to be learn, inspire, and create. Any contributions you make are greatly appreciated. 
+Contributions are what make the open source community such an amazing place to learn, inspire, and create. Any contributions you make are greatly appreciated. 
 
 Please look at [CONTRIBUTING.md](https://appflowy.gitbook.io/docs/essential-documentation/contribute-to-appflowy/contributing-to-appflowy) for details.