Fix DocFX not rendering the API

We face the issue from dotnet/docfx#8097.
We fix it with [this hacky fix].

[this hacky fix]: dotnet/docfx#8097 (comment)

.github/workflows/doc.yml

@@ -4,10 +4,14 @@ on:
   push:
     branches:
       - main
+      - mristin/Fix-docfx-not-rendering-API
 
 jobs:
   Generate-doc:
-    runs-on: windows-latest
+    # We need to use ubuntu-latest due to the bug in MSBuild in VS Studio 17.3.3
+    # which is shipped with GitHub's image.
+    # See: https://github.com/dotnet/docfx/issues/8097
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@master
 
@@ -24,7 +28,7 @@ jobs:
         run: dotnet build src/
 
       - name: Generate the documentation
-        run: doc/docfx.console.2.59.3/tools/docfx.exe doc/source/docfx.json
+        run: doc/docfx.console.2.59.3/tools/docfx doc/source/docfx.json
 
       - name: Deploy to gh-pages 🚀
         uses: peaceiris/actions-gh-pages@v3