Update what-is-codegen.md document to improve grammar and readability (#4736)

Author: AshishGapat

docs/the-new-architecture/what-is-codegen.md

@@ -1,15 +1,15 @@
 # What is Codegen?
 
-**Codegen** is a tool to avoid writing a lot of repetitive code. Using Codegen **is not mandatory**: you can write all the generated manually. However, **Codegen** generates scaffolding code that could save you a lot of time.
+**Codegen** is a tool to avoid writing a lot of repetitive code. Using Codegen **is not mandatory**: you can write all the generated code manually. However, Codegen generates scaffolding code that could save you a lot of time.
 
-React Native invokes **Codegen** automatically every time an iOS or Android app is built. Occasionally, you would like to manually run the **Codegen** scripts to know which types and files are actually generated: this is a common scenario when developing Turbo Native Modules and Fabric Native Components.
+React Native invokes Codegen automatically every time an iOS or Android app is built. Occasionally, you would like to manually run the Codegen scripts to know which types and files are actually generated: this is a common scenario when developing [Turbo Native Modules](/docs/turbo-native-modules-introduction) and Fabric Native Components.
 
 <!-- TODO: Add links to TM and FC -->
 
-## How does Codegen works
+## How Codegen Works
 
-**Codegen** is a process that is tightly coupled with a React Native app. The **Codegen** scripts live inside the `react-native` NPM package and the apps call those scripts at build time.
+**Codegen** is a process that is tightly coupled with a React Native app. The Codegen scripts live inside the `react-native` NPM package and the apps call those scripts at build time.
 
-**Codegen** crawls the folders in your project, starting from a directory you specify in your `package.json`, looking for some specific JS files that contains the specification (or specs) for your custom modules and components. Spec files are JS files written in a typed dialect: React Native currently supports Flow and TypeScript.
+Codegen crawls the folders in your project, starting from a directory you specify in your `package.json`, looking for some specific JS files that contain the specification (or specs) for your custom modules and components. Spec files are JS files written in a typed dialect: React Native currently supports Flow and TypeScript.
 
-Every time **Codegen** finds a spec file, it generates the boilerplate code associated to it. **Codegen** generates some C++ glue-code and then it generates platform-specific code, using Java for Android and Objective-C++ for iOS.
+Every time Codegen finds a spec file, it generates boilerplate code associated with it. Codegen generates some C++ glue-code and then it generates platform-specific code, using Java for Android and Objective-C++ for iOS.

website/versioned_docs/version-0.81/the-new-architecture/what-is-codegen.md

@@ -1,15 +1,15 @@
 # What is Codegen?
 
-**Codegen** is a tool to avoid writing a lot of repetitive code. Using Codegen **is not mandatory**: you can write all the generated manually. However, **Codegen** generates scaffolding code that could save you a lot of time.
+**Codegen** is a tool to avoid writing a lot of repetitive code. Using Codegen **is not mandatory**: you can write all the generated code manually. However, Codegen generates scaffolding code that could save you a lot of time.
 
-React Native invokes **Codegen** automatically every time an iOS or Android app is built. Occasionally, you would like to manually run the **Codegen** scripts to know which types and files are actually generated: this is a common scenario when developing Turbo Native Modules and Fabric Native Components.
+React Native invokes Codegen automatically every time an iOS or Android app is built. Occasionally, you would like to manually run the Codegen scripts to know which types and files are actually generated: this is a common scenario when developing [Turbo Native Modules](/docs/turbo-native-modules-introduction) and Fabric Native Components.
 
 <!-- TODO: Add links to TM and FC -->
 
-## How does Codegen works
+## How Codegen Works
 
-**Codegen** is a process that is tightly coupled with a React Native app. The **Codegen** scripts live inside the `react-native` NPM package and the apps call those scripts at build time.
+**Codegen** is a process that is tightly coupled with a React Native app. The Codegen scripts live inside the `react-native` NPM package and the apps call those scripts at build time.
 
-**Codegen** crawls the folders in your project, starting from a directory you specify in your `package.json`, looking for some specific JS files that contains the specification (or specs) for your custom modules and components. Spec files are JS files written in a typed dialect: React Native currently supports Flow and TypeScript.
+Codegen crawls the folders in your project, starting from a directory you specify in your `package.json`, looking for some specific JS files that contain the specification (or specs) for your custom modules and components. Spec files are JS files written in a typed dialect: React Native currently supports Flow and TypeScript.
 
-Every time **Codegen** finds a spec file, it generates the boilerplate code associated to it. **Codegen** generates some C++ glue-code and then it generates platform-specific code, using Java for Android and Objective-C++ for iOS.
+Every time Codegen finds a spec file, it generates boilerplate code associated with it. Codegen generates some C++ glue-code and then it generates platform-specific code, using Java for Android and Objective-C++ for iOS.