imp - Build project before building docs

---

To ensure that the documentation stays consistent and to make sure that all the generators (if any) run, we've added a build command.

---

Type: imp
Breaking: False
Doc Required: False
Backport Required: False
Part: 1/1

.github/workflows/docgen.yml

@@ -22,7 +22,9 @@ jobs:
       - name: Setup DocFX
         run: dotnet tool install --global docfx
       - name: Generating Documentation
-        run: make doc
+        run: |
+          make
+          make doc
       - name: Saving changes to gh-pages
         uses: peaceiris/actions-gh-pages@v3
         with: