[ci] Update labeler for special cases (#4528)

Not all iOS implementation packages use `_ios` now. This adds `_storekit` and `_wkwebview` as known patterns for iOS implementation packages so that they will be labelled correctly.

Author: stuartmorgan-g

.github/labeler.yml

@@ -85,6 +85,8 @@
 
 'platform-ios':
   - packages/*/*_ios/**/*
+  - packages/*/*_storekit/**/*
+  - packages/*/*_wkwebview/**/*
   - packages/**/ios/**/*
 
 'platform-linux':