Update CompatHelper workflow permissions

Author: terasakisatoshi

.github/workflows/CompatHelper.yml

@@ -5,12 +5,14 @@ on:
   workflow_dispatch:
 jobs:
   CompatHelper:
+    permissions:
+      pull-requests: write
+      contents: write
     runs-on: ubuntu-latest
     steps:
       - name: Pkg.add("CompatHelper")
         run: julia -e 'using Pkg; Pkg.add("CompatHelper")'
       - name: CompatHelper.main()
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          COMPATHELPER_PRIV: ${{ secrets.DOCUMENTER_KEY }}
-        run: julia -e 'using CompatHelper; CompatHelper.main()'
+        run: julia -e 'using CompatHelper; CompatHelper.main()'