[Bug] fail to build with python 3.13

[hubutui]

Branch

main branch (mmpretrain version)

Describe the bug

similar to open-mmlab/mmengine#1616

Environment

none

Other information

quick fix, modify get_version in setup.py:

def get_version():
    version_dict = {}
    version_file = 'mmpretrain/version.py'
    with open(version_file, 'r', encoding='utf-8') as f:
        exec(compile(f.read(), version_file, 'exec'), version_dict)
    return version_dict['__version__']