Bump voxmedia/github-action-slack-notify-build from 1 to 2

Bumps [voxmedia/github-action-slack-notify-build](https://github.com/voxmedia/github-action-slack-notify-build) from 1 to 2.
- [Release notes](https://github.com/voxmedia/github-action-slack-notify-build/releases)
- [Changelog](https://github.com/voxmedia/github-action-slack-notify-build/blob/main/CHANGELOG.md)
- [Commits](voxmedia/github-action-slack-notify-build@v1...v2)

---
updated-dependencies:
- dependency-name: voxmedia/github-action-slack-notify-build
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/test-from-pypi.yml

@@ -122,7 +122,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Notify Slack channel on failure
-        uses: voxmedia/github-action-slack-notify-build@v1
+        uses: voxmedia/github-action-slack-notify-build@v2
         with:
           channel_id: ${{ secrets.ETS_SLACK_CHANNEL_ID }}
           status: FAILED
@@ -136,7 +136,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Notify Slack channel on success
-        uses: voxmedia/github-action-slack-notify-build@v1
+        uses: voxmedia/github-action-slack-notify-build@v2
         with:
           channel_id: ${{ secrets.ETS_BOTS_SLACK_CHANNEL_ID }}
           status: SUCCESS