fix: use simpler deploy step for WebGL

.github/workflows/build.yml

@@ -50,27 +50,10 @@ jobs:
                   name: Build-${{ matrix.targetPlatform }}
                   path: build/${{ matrix.targetPlatform }}
 
-    # Deploy WebGL build to GitHub Pages
-    deploy:
-        name: Deploy WebGL to GitHub Pages
-
-        # Add a dependency to the build job
-        needs: build
-
-        # Grant GITHUB_TOKEN the permissions required to make a Pages deployment
-        permissions:
-            pages: write # to deploy to Pages
-            id-token: write # to verify the deployment originates from an appropriate source
-
-        # Deploy to the github-pages environment
-        environment:
-            name: github-pages
-            url: ${{ steps.deployment.outputs.page_url }}
-
-        runs-on: ubuntu-latest
-        steps:
-            - name: Deploy to GitHub Pages
-              id: deployment
-              uses: actions/deploy-pages@v4
+            # Deploy (WebGL)
+            - name: Deploy WebGL build to GitHub Pages
+              if: ${{ matrix.targetPlatform == 'WebGL' }}
+              uses: peaceiris/actions-gh-pages@v3
               with:
-                  artifact_name: Build-WebGL
+                  github_token: ${{ secrets.GITHUB_TOKEN }}
+                  publish_dir: ./build/${{ matrix.targetPlatform }}