graphics/py-cairo: unbreak with python310
>>> import cairo
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python3.10/site-packages/cairo/__init__.py", line 1, in <module>
from ._cairo import * # noqa: F401,F403
ImportError: /usr/local/lib/python3.10/site-packages/cairo/_cairo.cpython-310.so: Undefined symbol "PyObject_AsReadBuffer"
ImportError: /usr/local/lib/python3.10/site-packages/cairo/_cairo.cpython-310.so: Undefined symbol "PyObject_AsWriteBuffer"
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