Update .github/workflows/pr.yaml

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: Chris-Wolfgang

.github/workflows/pr.yaml

@@ -579,3 +579,5 @@ jobs:
 
       - name: Perform CodeQL Analysis
         uses: github/codeql-action/analyze@v3
+        with:
+          category: "/language:csharp"