Add permissions to GitHub Actions workflow

Specified 'contents: read' and 'pull-requests: write' permissions in the workflow to improve security and enable required actions.

Author: philippeVerney

.github/workflows/github-actions.yml

@@ -1,5 +1,8 @@
 name: github-actions
 on: [push, pull_request]
+permissions:
+  contents: read
+  pull-requests: write
 jobs:
   windows-2022-staticLink-cs:
     runs-on: windows-2022