Bump slackapi/slack-github-action from 1.23 to 1.26

Bumps [slackapi/slack-github-action](https://github.com/slackapi/slack-github-action) from 1.23 to 1.26.
- [Release notes](https://github.com/slackapi/slack-github-action/releases)
- [Commits](slackapi/slack-github-action@v1.23...v1.26)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/tag_and_build.yaml

@@ -36,7 +36,7 @@ jobs:
       - name: Post to a Slack channel
         if: ${{ success() }}
         id: slack_success
-        uses: slackapi/slack-github-action@v1.23
+        uses: slackapi/slack-github-action@v1.26
         with:
           channel-id: 'sdcadmin-operator'
           slack-message: ':cool-doge: `${{github.repository}}` new version: ${{needs.tagging.outputs.next_tag}}'