Fix build-docs to download packages-ubuntu-latest (matching template)

Co-authored-by: Malcolmnixon <1863707+Malcolmnixon@users.noreply.github.com>

Author: Copilot

.github/workflows/build.yaml

@@ -419,7 +419,7 @@ jobs:
       - name: Download packages artifact
         uses: actions/download-artifact@v8
         with:
-          name: packages-windows-latest
+          name: packages-ubuntu-latest
           path: packages
 
       # === INSTALL DEPENDENCIES ===