[Fabric] Fix PlatformColor (#14325)

* Fix platform color

* Change files

* Add missing theme colors

* snapshots

Author: acoates-ms

change/react-native-windows-9a0e5c82-b824-4c1d-92c9-87c8c46c6c26.json

@@ -0,0 +1,7 @@
+{
+  "type": "prerelease",
+  "comment": "Fix platform color",
+  "packageName": "react-native-windows",
+  "email": "[email protected]",
+  "dependentChangeType": "patch"
+}