Update docs

Author: yoannmoinet

README.md

@@ -320,7 +320,7 @@ Your function will receive three arguments:
 - `context`: The global context shared accross our plugin.
 - `log`: A [logger](/packages/factory/README.md#logger) to display messages.
 
-The `context` object is a shared object that is mutated during the build process. It contains the following properties:
+The `context` is a shared object that is mutated during the build process. It contains the following properties:
 
 <!-- #global-context-type -->
 ```typescript

packages/factory/README.md

@@ -74,7 +74,7 @@ logger.info('This is an info');
 logger.debug('This is a debug message');
 ```
 
-You can also create "sub-logger" when you want to individually identify logs from a specific part of your plugin.<br/>
+You can also create a "sub-logger" when you want to individually identify logs from a specific part of your plugin.<br/>
 Simply use `log.getLogger('my-plugin')` for this:
 
 ```typescript