Update build action to setup docfx as dotnet tool

Author: glopesdev

.github/workflows/build.yml

@@ -15,6 +15,11 @@ jobs:
         with:
           submodules: recursive
 
+      - name: Setup .NET Core SDK
+        uses: actions/setup-dotnet@v3.2.0
+        with:
+          dotnet-version: 7.x
+
       - name: Custom Build Steps
         run: .\build.ps1
 
@@ -25,12 +30,10 @@ jobs:
         run: msbuild -t:restore src\harp\Bonsai.Harp.sln
 
       - name: Setup DocFX
-        uses: crazy-max/ghaction-chocolatey@v1
-        with:
-          args: install docfx
+        run: dotnet tool restore
 
       - name: Build Documentation
-        run: docfx docfx.json
+        run: dotnet docfx docfx.json
 
       - name: Checkout gh-pages
         uses: actions/checkout@v2