chore: mark native image checks as required (#541)

* chore: add native image checks as required

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

java-recommendations-ai/.github/sync-repo-settings.yaml

@@ -16,6 +16,8 @@ branchProtectionRules:
       - 'Kokoro - Test: Integration'
       - cla/google
       - OwlBot Post Processor
+      - 'Kokoro - Test: Java GraalVM Native Image'
+      - 'Kokoro - Test: Java 17 GraalVM Native Image'
   - pattern: java7
     isAdminEnforced: true
     requiredApprovingReviewCount: 1