Upgrade: [dependabot] - bump NHSDigital/eps-workflow-dependabot/.github/workflows/dependabot-auto-approve-and-merge.yml

Bumps [NHSDigital/eps-workflow-dependabot/.github/workflows/dependabot-auto-approve-and-merge.yml](https://github.com/nhsdigital/eps-workflow-dependabot) from 1.0.15 to 1.0.21.
- [Release notes](https://github.com/nhsdigital/eps-workflow-dependabot/releases)
- [Commits](NHSDigital/eps-workflow-dependabot@684e4b4...5634c7e)

---
updated-dependencies:
- dependency-name: NHSDigital/eps-workflow-dependabot/.github/workflows/dependabot-auto-approve-and-merge.yml
  dependency-version: 1.0.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

.github/workflows/pull_request.yml

@@ -10,7 +10,7 @@ env:
 jobs:
   dependabot-auto-approve-and-merge:
     needs: quality_checks
-    uses: NHSDigital/eps-workflow-dependabot/.github/workflows/dependabot-auto-approve-and-merge.yml@684e4b4ec224915a8cca6fa6ba39362b04676954
+    uses: NHSDigital/eps-workflow-dependabot/.github/workflows/dependabot-auto-approve-and-merge.yml@5634c7e01d60487e11a82decc7b2803a001bf0db
     secrets:
       AUTOMERGE_APP_ID: ${{ secrets.AUTOMERGE_APP_ID }}
       AUTOMERGE_PEM: ${{ secrets.AUTOMERGE_PEM }}