chore(deps): Bump slackapi/slack-github-action from 1.25.0 to 1.26.0

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
...

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

.github/workflows/nightly-test-release.yaml

@@ -117,7 +117,7 @@ jobs:
     if: ${{ failure() || cancelled() }}
     runs-on: ubuntu-latest
     steps:
-      - uses: slackapi/slack-github-action@v1.25.0
+      - uses: slackapi/slack-github-action@v1.26.0
         with:
           payload: |
             {

.github/workflows/run-e2e-suite.yaml

@@ -102,7 +102,7 @@ jobs:
           commit: true
       - name: Send failed status to slack
         if: failure()
-        uses: slackapi/slack-github-action@v1.25.0
+        uses: slackapi/slack-github-action@v1.26.0
         with:
           payload: |
             {