Use latest Python for stubtest in CI (#10641)

.github/workflows/daily.yml

@@ -48,6 +48,7 @@ jobs:
           cache: pip
           cache-dependency-path: requirements-tests.txt
           allow-prereleases: true
+          check-latest: true
       - name: Install dependencies
         run: pip install -r requirements-tests.txt
       - name: Run stubtest

.github/workflows/stubtest_stdlib.yml

@@ -44,6 +44,7 @@ jobs:
           cache: pip
           cache-dependency-path: requirements-tests.txt
           allow-prereleases: true
+          check-latest: true
       - name: Install dependencies
         run: pip install -r requirements-tests.txt
       - name: Run stubtest