Upgrade `actions/github-script` from 7 to 8 version (#1746)

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

.github/workflows/docker.yml

@@ -43,7 +43,7 @@ jobs:
 
       - name: Detect correct Git ref for image build
         id: git
-        uses: actions/github-script@v7
+        uses: actions/github-script@v8
         with:
           script: |
             let out = {ref: 'HEAD', ver: ''};
@@ -141,7 +141,7 @@ jobs:
 
       - name: Detect correct Git version for image tests
         id: git
-        uses: actions/github-script@v7
+        uses: actions/github-script@v8
         with:
           script: |
             let out = {ref: 'HEAD', ver: ''};