Update codeql-analysis.yml

Author: jamesmcroft

.github/workflows/codeql-analysis.yml

@@ -39,6 +39,16 @@ jobs:
     steps:
     - name: Checkout repository
       uses: actions/checkout@v3
+      
+    - name: Setup .NET 5.0
+      uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: 5.0.x
+
+    - name: Setup .NET 6.0
+      uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: 6.0.x
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL