change link to location pg to top of pg (not anchor)

Author: rachelsaunders

firestore-shorten-urls-bitly/extension.yaml

@@ -58,7 +58,7 @@ params:
     description: >-
       Where should the extension be deployed? You usually want a location close to your database.
       For help selecting a location, refer to the
-      [location selection guide](https://firebase.google.com/docs/functions/locations#selecting_regions_for_firestore_and_storage).
+      [location selection guide](https://firebase.google.com/docs/functions/locations).
     options:
       - label: Iowa (us-central1)
         value: us-central1