update codeql with .net 7 setup

Author: christiannagel

.github/workflows/codeql-analysis.yml

@@ -49,6 +49,12 @@ jobs:
         # By default, queries listed here will override any specified in a config file.
         # Prefix the list here with "+" to use these queries and those in the config file.
         # queries: ./path/to/local/query, your-org/your-repo/queries@main
+        
+    # Setup .NET 7
+    - name: Setup .NET 7
+      uses: actions/setup-dotnet@v3
+      with:
+        dotnet-version 7.0.x
 
     # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
     # If this step fails, then you should remove it and run the build manually (see below)