chore(deps): bump slackapi/slack-github-action from 1.24.0 to 1.25.0 (ietf-tools#6991)

Bumps [slackapi/slack-github-action](https://github.com/slackapi/slack-github-action) from 1.24.0 to 1.25.0.
- [Release notes](https://github.com/slackapi/slack-github-action/releases)
- [Commits](slackapi/slack-github-action@v1.24.0...v1.25.0)

---
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/build.yml

@@ -312,7 +312,7 @@ jobs:
     steps:      
     - name: Notify on Slack (Success)
       if: ${{ !contains(join(needs.*.result, ','), 'failure') }}
-      uses: slackapi/slack-github-action@v1.24.0
+      uses: slackapi/slack-github-action@v1.25.0
       with:
         channel-id: ${{ secrets.SLACK_GH_BUILDS_CHANNEL_ID }}
         payload: |
@@ -335,7 +335,7 @@ jobs:
         SLACK_BOT_TOKEN: ${{ secrets.SLACK_GH_BOT }}
     - name: Notify on Slack (Failure)
       if: ${{ contains(join(needs.*.result, ','), 'failure') }}
-      uses: slackapi/slack-github-action@v1.24.0
+      uses: slackapi/slack-github-action@v1.25.0
       with:
         channel-id: ${{ secrets.SLACK_GH_BUILDS_CHANNEL_ID }}
         payload: |