updating .net version for CI

Author: aaronpowell

.github/workflows/docker-image.yml

@@ -24,7 +24,7 @@ jobs:
       - name: Setup .NET
         uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: "9.0.x"
+          dotnet-version: "10.0.x"
 
       - name: Restore
         working-directory: ./mcp-server