CI: install ninja and cmake before build

scikit-build-core requires ninja for the CMake build.

Co-Authored-By: Claude Opus 4 (1M context) <noreply@anthropic.com>

Author: mjkpolo

.github/workflows/ci.yml

@@ -13,4 +13,5 @@ jobs:
       image: rocm/dev-ubuntu-22.04:7.2
     steps:
       - uses: actions/checkout@v4
+      - run: pip install ninja cmake
       - run: pip install -e .