Another fix for previous commit

Author: GlebChili

.github/workflows/azure-static-web-apps-nightly-docs.yml

@@ -34,6 +34,9 @@ jobs:
       - name: Install DocFX
         run: dotnet tool update -g docfx
 
+      - name: Build Gmod.NET solution
+        run: dotnet build runtime.csproj -c Release
+
       - name: Build docs with DocFX
         shell: pwsh
         run: |