Switch back to upstream setup-python with PyPy fix [ci] (#10501)

Author: cdce8p

.github/workflows/tests.yaml

@@ -47,8 +47,9 @@ jobs:
         uses: actions/[email protected]
       - name: Set up Python ${{ matrix.python-version }}
         id: python
-        # Custom with PyPy fix: https://github.com/actions/setup-python/pull/1110
-        uses: cdce8p/[email protected]
+        # Use unreleased version with PyPy fix: https://github.com/actions/setup-python/pull/1110
+        # TODO move back to tagged versions for >5.6.0
+        uses: actions/setup-python@88ffd4d597d830d67a7369dd33dcb72c0958a807
         with:
           python-version: ${{ matrix.python-version }}
           check-latest: true