forgot to install dfmg

Author: caesay

.github/workflows/daily.yml

@@ -39,8 +39,10 @@ jobs:
           repository: velopack/velopack.fusion
           path: velopack.fusion
 
-      - name: Install docfx
-        run: dotnet tool install -g docfx
+      - name: Install dotnet tools
+        run: |
+          dotnet tool install -g docfx
+          dotnet tool install -g DocFxMarkdownGen
 
       - name: Install dependencies
         working-directory: velopack.docs