Bump actions/github-script from 7 to 8 (pydantic#12309)

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

Author: dependabot[bot]

.github/workflows/third-party.yml

@@ -681,7 +681,7 @@ jobs:
     permissions:
       issues: write
     steps:
-      - uses: actions/github-script@v7
+      - uses: actions/github-script@v8
         with:
           script: |
             await github.rest.issues.create({