Update _foundation.md

Co-authored-by: Jonathan Grynspan <grynspan@me.com>

Author: fpseverino

documentation/core-libraries/_foundation.md

@@ -9,7 +9,7 @@ The Foundation framework defines a base layer of functionality that is required
 * Provide a level of OS independence, to enhance portability.
 
 
-Swift 6 unified the implementation of [Foundation](https://developer.apple.com/documentation/foundation/) across all platforms. The modern, portable Swift implementation provides consistency across platforms, it’s more robust, and it’s open source.
+Swift 6 unifies the implementation of [Foundation](https://developer.apple.com/documentation/foundation/) across all platforms. Foundation's modern, portable Swift implementation provides consistency across platforms, is more robust, and is open source.
 
 If your app is particularly sensitive to binary size, you can import the `FoundationEssentials` library, which provides a more targeted subset of Foundation’s features that omits internationalization and localization data.