Chore(deps): Bump the actions group across 1 directory with 3 updates

Bumps the actions group with 3 updates in the / directory: [actions/upload-artifact](https://github.com/actions/upload-artifact), [actions/github-script](https://github.com/actions/github-script) and [slackapi/slack-github-action](https://github.com/slackapi/slack-github-action).


Updates `actions/upload-artifact` from 6 to 7
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v6...v7)

Updates `actions/github-script` from 8 to 9
- [Release notes](https://github.com/actions/github-script/releases)
- [Commits](actions/github-script@v8...v9)

Updates `slackapi/slack-github-action` from 2.1.1 to 3.0.1
- [Release notes](https://github.com/slackapi/slack-github-action/releases)
- [Commits](slackapi/slack-github-action@v2.1.1...v3.0.1)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
- dependency-name: actions/github-script
  dependency-version: '9'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
- dependency-name: slackapi/slack-github-action
  dependency-version: 3.0.1
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
...

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

Author: dependabot[bot]

.github/workflows/check-pull-request.yml

@@ -176,7 +176,7 @@ jobs:
 
       - name: Save test coverage
         if: ${{ always() }}
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: ${{ matrix.task.description }} coverage
           path: coverage

.github/workflows/pr-notifier.yml

@@ -50,7 +50,7 @@ jobs:
 
     steps:
       - name: Build Slack JSON
-        uses: actions/github-script@v8
+        uses: actions/github-script@v9
         id: payload
         if: github.event.action != 'submitted' || github.event.review.state == 'approved'
 
@@ -89,7 +89,7 @@ jobs:
             }
 
       - name: Post to Slack
-        uses: slackapi/slack-github-action@v2.1.1
+        uses: slackapi/slack-github-action@v3.0.1
         if: github.event.action != 'submitted' || github.event.review.state == 'approved'
 
         with: