chore: use team to label core team PRs (#4846)

Instead of keeping this list up to data manually.



---

By submitting this pull request, I confirm that my contribution is made under the terms of the [Apache 2.0 license].

[Apache 2.0 license]: https://www.apache.org/licenses/LICENSE-2.0

Author: mrgrain

.mergify/config.yml

@@ -26,7 +26,7 @@ pull_request_rules:
       label:
         add: [contribution/core]
     conditions:
-      - author~=^(rix0rrr|iliapolo|kaizencc|otaviomacedo|mrgrain|paulhcsun|iankhou|HBobertz|sumupitchayan|jiayiwang7)$
+      - author=@aws/aws-cdk-team
       - -label~="contribution/core"
   - name: Tell them we're good now
     actions: