fix: correct the version of .Net installed

Author: andrueastman

.github/workflows/codeql.yml

@@ -24,7 +24,7 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v4
       with:
-        dotnet-version: 7.x
+        dotnet-version: 8.x
 
     - name: Install dependencies
       run: dotnet restore