Sync auto-assign-copilot.yml from .github repo

Author: P4X-ng

.github/workflows/auto-assign-copilot.yml

@@ -11,10 +11,10 @@ jobs:
   copilot:
     # only run when the label that was added is exactly "copilot"
     if: github.event.label.name == 'copilot'
-    runs-on: ubuntu-latest
+    runs-on: [self-hosted, linux, x64, big]
     steps:
       - name: Comment and (optionally) add model label
-        uses: actions/github-script@v7
+        uses: actions/github-script@v7.1.0
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           script: |