Chore: update build command and preview URL in GitHub Actions workflow

Signed-off-by: hortison <[email protected]>

Author: hortison

.github/workflows/static.yml

@@ -40,7 +40,7 @@ jobs:
       - name: Install dependencies
         run: make setup
       - name: Build Academy
-        run: make build-preview
+        run: make build-preview $BASEURL=https://${{ github.repository_owner }}.github.io/${{ github.event.repository.name }}/pr-preview-${{ github.event.pull_request.number || github.run_id }}
       - name: Upload artifact
         uses: actions/upload-pages-artifact@v3
         with:
@@ -58,7 +58,7 @@ jobs:
             🚀 **Preview deployment for PR #${{ github.event.pull_request.number }}**
             
             📖 Preview: ${{ steps.deployment.outputs.page_url }}
-            🌐 Alternative URL: https://${{ github.repository_owner }}.github.io/${{ github.event.repository.name }}/
+            🌐 PR URL: https://${{ github.repository_owner }}.github.io/${{ github.event.repository.name }}/pr-preview-${{ github.event.pull_request.number || github.run_id }}
             
             > Environment: `pr-preview-${{ github.event.pull_request.number }}`