Configure environment for update-dotnet-install-script.yml (#693)

Author: sliekens

.github/workflows/update-dotnet-install-script.yml

@@ -7,6 +7,7 @@ on:
 jobs:
   fetch-latest-dotnet-install:
     runs-on: ubuntu-latest
+    environment: documentation # grants access to secrets.PAT, for creating pull requests
     steps:
       - uses: actions/checkout@v3