[TEMPORARY] use alpha 7

Author: johnzhou721

.github/workflows/ci.yaml

@@ -109,7 +109,7 @@ jobs:
       with:
         # Appending -dev ensures that we can always build the dev release.
         # It's a no-op for versions that have been published.
-        python-version: ${{ needs.config.outputs.PYTHON_VER }}-dev
+        python-version: ${{ needs.config.outputs.PYTHON_VER }}-alpha.7
         # Ensure that we *always* use the latest build, not a cached version.
         # It's an edge case, but when a new alpha is released, we need to use it ASAP.
         check-latest: true