Update release notes for v1.28 (#5957)

Adding what I put in
https://github.com/microsoft/winget-cli/releases/tag/v1.28.90-preview
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Author: florelis

doc/ReleaseNotes.md

@@ -1,5 +1,8 @@
 ## New in v1.28
 
+* Bumped the winget version to 1.28 to match the package version.
+* Additional [options for limiting the size of log files](https://github.com/microsoft/winget-cli/blob/master/doc/Settings.md#file).
+
 # Experimental Feature: 'sourceEdit'
 New feature that adds an 'edit' subcommand to the 'source' command. This can be used to set an explicit source to be implicit and vice-versa. For example, with this feature you can make the 'winget-font' source an implicit source instead of explicit source.
 
@@ -11,8 +14,6 @@ To enable this feature, add the 'sourceEdit' experimental feature to your settin
 ```
 To use the feature, try `winget source edit winget-font` to set the Explicit state to the default.
 
-<!-- Nothing yet! -->
-
 ## Bug Fixes
 * Portable Packages now use the correct directory separators regardless of which convention is used in the manifest
 * `--suppress-initial-details` now works with `winget configure test`