ci: updated docs workflow to utilize .Net 8 and .Net 9 to correct build after #162

Author: JerrettDavis

.github/workflows/docs.yml

@@ -26,7 +26,9 @@ jobs:
       - name: Dotnet Setup
         uses: actions/setup-dotnet@v3
         with:
-          dotnet-version: 8.x
+          dotnet-version: |
+            8.x
+            9.x
 
       - run: dotnet tool update -g docfx
       - run: docfx ./docfx.json
@@ -37,4 +39,4 @@ jobs:
           path: './_site'
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v4
+        uses: actions/deploy-pages@v4