ci: Use check-regexp to wait for test jobs

The 'Tests Status' aggregation job runs after all tests complete, causing a
race condition where the release workflow couldn't find the check. Use regexp
to wait for all 'Test on Python' jobs directly instead.

Assisted-by: Claude Code (Opus 4.5)

Author: rdwj

.github/workflows/workflow.yaml

@@ -21,7 +21,7 @@ jobs:
         uses: lewagon/wait-on-check-action@v1.3.1
         with:
           ref: ${{ github.ref }}
-          check-name: 'Tests Status'
+          check-regexp: 'Test on Python'
           repo-token: ${{ secrets.GITHUB_TOKEN }}
           wait-interval: 10