Bump digitalservicebund/notify-on-failure-gha from 1.4.0 to 1.5.0 (#4)

Bumps [digitalservicebund/notify-on-failure-gha](https://github.com/digitalservicebund/notify-on-failure-gha) from 1.4.0 to 1.5.0.
- [Release notes](https://github.com/digitalservicebund/notify-on-failure-gha/releases)
- [Commits](digitalservicebund/notify-on-failure-gha@v1.4.0...814d0c4)

---
updated-dependencies:
- dependency-name: digitalservicebund/notify-on-failure-gha
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/pipeline.yml

@@ -190,7 +190,7 @@ jobs:
         uses: actions/deploy-pages@v4
 
       - name: Send status to Slack
-        uses: digitalservicebund/notify-on-failure-gha@15dd05b628141b7bac0ad26e08c1935cb3ba6bc8 # v1.4.0
+        uses: digitalservicebund/notify-on-failure-gha@814d0c4b2ad6a3443e89c991f8657b10126510bf # v1.5.0
         if: ${{ failure() }}
         with:
           SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}