Update codeql dotnet version

.github/workflows/codeql-analysis.yml

@@ -24,7 +24,9 @@ jobs:
     - name: Setup .NET Core
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: '5.0.x'
+        dotnet-version: '6.0.x'
+        include-prerelease: true
+        
     - name: Initialize CodeQL
       uses: github/codeql-action/init@v1
       with: