GitHub Actions: Fix CodeQL workflow

The CodeQL workflow needs a permission section to run: `...please ensure
the workflow has at least the 'security-events: read' permission.`

Author: heijligen

.github/workflows/codeql-analysis.yml

@@ -14,6 +14,10 @@ on:
   schedule:
     - cron: '0 22 * * 1'
 
+permissions:
+  contents: read
+  security-events: read
+
 jobs:
   analyze:
     name: Analyze