Allow PyPy to fail on CI.

Failures are apparently unrelated but needs more investigation.

Author: abravalheri

.github/workflows/main.yml

@@ -64,7 +64,8 @@ jobs:
           python: "3.10"
           distutils: stdlib
     runs-on: ${{ matrix.platform }}
-    continue-on-error: ${{ matrix.python == '3.14' }}
+    continue-on-error: ${{ matrix.python == '3.14' || matrix.python == 'pypy3.10' }}
+    # XXX: pypy seems to be flaky with unrelated tests in #6345
     env:
       SETUPTOOLS_USE_DISTUTILS: ${{ matrix.distutils || 'local' }}
     timeout-minutes: 75