chore(deps): bump slackapi/slack-github-action

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


Updates `slackapi/slack-github-action` from 3.0.1 to 3.0.3
- [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@v3.0.1...v3.0.3)

---
updated-dependencies:
- dependency-name: slackapi/slack-github-action
  dependency-version: 3.0.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: github-actions
...

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

Author: dependabot[bot]

.github/workflows/integration-test-matrix.yml

@@ -390,7 +390,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - name: Notify failure
-        uses: slackapi/slack-github-action@v3.0.1
+        uses: slackapi/slack-github-action@v3.0.3
         if: env.SLACK_CAMUNDA_EX_CI_WEBHOOK != ''
         env:
           SLACK_CAMUNDA_EX_CI_WEBHOOK: ${{ secrets.SLACK_CAMUNDA_EX_CI_WEBHOOK }}