[UPDATE] (deps): Bump reactive-firewall/flake8-cq in /.github/workflows

Bumps [reactive-firewall/flake8-cq](https://github.com/reactive-firewall/flake8-cq) from 1.6 to 2.1.
- [Release notes](https://github.com/reactive-firewall/flake8-cq/releases)
- [Commits](reactive-firewall/flake8-cq@ec38e8f...4814c66)

---
updated-dependencies:
- dependency-name: reactive-firewall/flake8-cq
  dependency-version: '2.1'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/flake8.yml

@@ -27,7 +27,7 @@ jobs:
         with:
           persist-credentials: false
       - name: Flake8 Scan
-        uses: reactive-firewall/flake8-cq@ec38e8ffedd289f6ee4e2da29e877704a486f587  # v1.6
+        uses: reactive-firewall/flake8-cq@4814c661364bed90ef63e0fbfcf0a73507bcf324  # v2.1
         with:  # optional arguments
           config: '.flake8.ini'
           match: '**/*.py'