build(deps): bump actions/github-script from 7 to 8 (#183)

Bumps [actions/github-script](https://github.com/actions/github-script) from 7 to 8.
- [Release notes](https://github.com/actions/github-script/releases)
- [Commits](actions/github-script@v7...v8)

---
updated-dependencies:
- dependency-name: actions/github-script
  dependency-version: '8'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/pr-validation.yaml

@@ -97,7 +97,7 @@ jobs:
       working-directory: terraform
 
     - name: Create the plan summary
-      uses: actions/github-script@v7
+      uses: actions/github-script@v8
       if: always()
       id: summary
       env: