Bump slackapi/slack-github-action from 1.25.0 to 1.26.0 in /.github/workflows (#2147)

Bump slackapi/slack-github-action in /.github/workflows

Bumps [slackapi/slack-github-action](https://github.com/slackapi/slack-github-action) from 1.25.0 to 1.26.0.
- [Release notes](https://github.com/slackapi/slack-github-action/releases)
- [Commits](slackapi/slack-github-action@v1.25.0...v1.26.0)

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

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

Author: dependabot[bot]

.github/workflows/weekly-enviroment.yml

@@ -83,7 +83,7 @@ jobs:
 
       # Once https://github.com/slackapi/slack-github-action/issues/84 will be resolved we can push the payload to a different file
       - name: Send custom JSON data to Slack workflow
-        uses: slackapi/slack-github-action@v1.25.0
+        uses: slackapi/slack-github-action@v1.26.0
         with:
           payload: |
             {