Merge pull request #387 from terrytangyuan/note-on-bucket

docs: Add a note on external-name annotation on bucket

examples/storage/bucket.yaml

@@ -6,6 +6,7 @@ metadata:
   labels:
     example: "true"
   annotations:
+    # Note that this will be the actual bucket name so it has to be globally unique/available.
     crossplane.io/external-name: crossplane-example-bucket
 spec:
   location: US