Description of problem:
marshalparser in RHEL 9 does not understand Python 3.11 pycs.

Traceback (most recent call last):
  File "/builddir/build/BUILD/marshalparser-0.3.0/marshal_content_check.py", line 18, in <module>
    original = marshal.load(fh)
               ^^^^^^^^^^^^^^^^
ValueError: bad marshal data (unknown type code)

Version-Release number of selected component (if applicable): 0.3.0-5

Reproducer:
Run marhsalparser tests for Python 3.11 as in https://gitlab.com/redhat/centos-stream/rpms/marshalparser/-/merge_requests/7

Additional info:
I believe https://github.com/fedora-python/marshalparser/commit/ccfd88fce1b3a91da92113eb7fe10ae6182cd150 might fix this, but I'd rather rebase.