Mypy linting broken on Pypy 3.9 and 3.10

Example: https://github.com/NiklasRosenstein/python-typeapi/actions/runs/8327003375/job/22783789277

```
 Collecting mypy
  Downloading mypy-1.9.0-py3-none-any.whl.metadata (1.9 kB)
# ...
mypy| Daemon started
mypy| src/typeapi/utils_test.py:1: error: invalid syntax  [syntax]
mypy|     # type: ignore
mypy|                   ^
```

Only happens on `pypy-3.9` or `pypy-3.10` 😕 