MESH-2092 Bump slackapi/slack-github-action

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


Updates `slackapi/slack-github-action` from 3.0.5 to 4.0.0
- [Release notes](https://github.com/slackapi/slack-github-action/releases)
- [Changelog](https://github.com/slackapi/slack-github-action/blob/main/CHANGELOG.md)
- [Commits](slackapi/slack-github-action@0d95c9a...dcb1066)

---
updated-dependencies:
- dependency-name: slackapi/slack-github-action
  dependency-version: 4.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: major
...

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

Author: dependabot[bot]

.github/workflows/dependabot-auto-merge.yaml

@@ -68,7 +68,7 @@ jobs:
 
       - name: Notify Slack of manual review required
         if: github.event.action == 'opened' && steps.metadata.outputs.update-type != 'version-update:semver-patch' && steps.metadata.outputs.update-type != 'version-update:semver-minor'
-        uses: slackapi/slack-github-action@0d95c9a7becc1e6e297d76df9bc735c44f4cbcbc # v3.0.5
+        uses: slackapi/slack-github-action@dcb1066f776dd043e64d0e8ba94ca15cc7e1875d # v4.0.0
         with:
           webhook: ${{ secrets.DEPENDABOT_SLACK_WEBHOOK_URL }}
           webhook-type: incoming-webhook

.github/workflows/pull-request.yml

@@ -39,7 +39,7 @@ jobs:
     if: ${{ always() && github.actor == 'dependabot[bot]' && contains(needs.*.result, 'failure') }}
     steps:
       - name: Slack Notification
-        uses: slackapi/slack-github-action@0d95c9a7becc1e6e297d76df9bc735c44f4cbcbc # v3.0.5
+        uses: slackapi/slack-github-action@dcb1066f776dd043e64d0e8ba94ca15cc7e1875d # v4.0.0
         with:
           webhook: ${{ secrets.DEPENDABOT_SLACK_WEBHOOK_URL }}
           webhook-type: incoming-webhook