chore(deps): bump actions/setup-python from 5.3.0 to 6.3.0

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 5.3.0 to 6.3.0.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](0b93645e9f...ece7cb06ca)

---
updated-dependencies:
- dependency-name: actions/setup-python
  dependency-version: 6.3.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/agent-team-apply-verify.yml

@@ -691,7 +691,7 @@ jobs:
           git commit --quiet --no-verify -m "candidate diff (sandbox baseline)" || true
 
       - name: Set up Python
-        uses: actions/setup-python@0b93645e9fea7318ecaed2b359559ac225c90a2b # v5.3.0
+        uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1 # v6.3.0
         with:
           python-version: "3.12"