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

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>

Author: dependabot[bot]

.github/workflows/sync-ref.yml

@@ -26,7 +26,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: check whether the ref is in sync
-        uses: actions/github-script@v7
+        uses: actions/github-script@v8
         id: check
         with:
           script: |
@@ -73,7 +73,7 @@ jobs:
           repositories: ${{ steps.check.outputs.target-repo-name }}
       - name: set authorization header
         if: steps.check.outputs.skip == 'false'
-        uses: actions/github-script@v7
+        uses: actions/github-script@v8
         id: auth
         with:
           script: |

.github/workflows/sync-upstream-branches.yml

@@ -26,7 +26,7 @@ jobs:
 
     steps:
       - name: check which refs need to be synchronized
-        uses: actions/github-script@v7
+        uses: actions/github-script@v8
         id: check
         with:
           script: |
@@ -131,7 +131,7 @@ jobs:
           repositories: ${{ steps.check.outputs.target-repo-name }}
       - name: set authorization header
         if: steps.check.outputs.refspec != ''
-        uses: actions/github-script@v7
+        uses: actions/github-script@v8
         id: auth
         with:
           script: |