Update mkdocs-material-insiders (#1603)

.github/workflows/preview.yml

@@ -3,7 +3,7 @@ name: 🔂 Surge PR Preview
 on:
   pull_request_target:
     types: [opened, synchronize, reopened]
-  
+
 # Ensures that only one mirror task will run at a time.
 concurrency:
   group: surge-sh
@@ -33,6 +33,8 @@ jobs:
 
       - name: Deploy to surge.sh
         uses: afc163/surge-preview@v1
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
           surge_token: ${{ secrets.SURGE_TOKEN }}
           github_token: ${{ secrets.GITHUB_TOKEN }}