chore: [DevOps] bump slackapi/slack-github-action (#39)

Bumps the github-actions group with 1 update: [slackapi/slack-github-action](https://github.com/slackapi/slack-github-action).


Updates `slackapi/slack-github-action` from 1.26.0 to 1.27.0
- [Release notes](https://github.com/slackapi/slack-github-action/releases)
- [Commits](slackapi/slack-github-action@v1.26.0...v1.27.0)

---
updated-dependencies:
- dependency-name: slackapi/slack-github-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: github-actions
...

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

.github/workflows/continuous-integration.yaml

@@ -93,7 +93,7 @@ jobs:
       - name: "Slack Notification"
         ## currently disabled, as there are no main builds yet
         if: false
-        uses: slackapi/slack-github-action@v1.26.0
+        uses: slackapi/slack-github-action@v1.27.0
         with:
           payload: |
             {

.github/workflows/e2e-test.yaml

@@ -61,7 +61,7 @@ jobs:
 
       - name: "Slack Notification"
         if: failure()
-        uses: slackapi/slack-github-action@v1.26.0
+        uses: slackapi/slack-github-action@v1.27.0
         with:
           payload: |
             {