use alpha flytekit

Signed-off-by: Yee Hing Tong <wild-endeavor@users.noreply.github.com>

.github/workflows/checks.yml

@@ -90,7 +90,7 @@ jobs:
           uv venv $GITHUB_WORKSPACE/.venv
           source $GITHUB_WORKSPACE/.venv/bin/activate
           if [ -f requirements.in ]; then uv pip install -r requirements.in; fi
-          uv pip install "git+https://github.com/flyteorg/flytekit.git@276c4646b209dcaf56768796dffbf772da95b784#egg=flytekit" "numpy<2.0.0"
+          uv pip install "flytekit>=1.15.0a0" "numpy<2.0.0"
           pip freeze
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3