Install .NET 9 in CodeQL analysis workflow (#1389)

Author: KyleMcMaster

.github/workflows/codeql-analysis.yml

@@ -15,6 +15,11 @@ jobs:
         id: checkout_repo
         uses: actions/checkout@v4
 
+      - name: Install .NET 9
+        uses: actions/setup-dotnet@v5
+        with:
+         dotnet-version: 9.0.x
+
       - name: Initialize CodeQL
         id: init_codeql
         uses: github/codeql-action/init@v3