Update actions/github-script to v8.0.0 to fix Node 20 deprecation (google#134)

Author: DeanChensj

.github/workflows/gemini-dispatch.yml

@@ -79,7 +79,7 @@ jobs:
 
       - name: 'Extract command'
         id: 'extract_command'
-        uses: 'actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea' # ratchet:actions/github-script@v7
+        uses: 'actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd' # ratchet:actions/github-script@v8.0.0
         env:
           EVENT_TYPE: '${{ github.event_name }}.${{ github.event.action }}'
           REQUEST: '${{ github.event.comment.body || github.event.review.body || github.event.issue.body }}'