Update python-zlib-ng to version 0.5.1 / rev 3 via SR 1225873
    
    https://build.opensuse.org/request/show/1225873
    by user dirkmueller + anag+factory
    - update to 0.5.1:
      * Fix a bug where flushing in threaded mode did not write the
        data to the output file.
      * Threaded reading and writing do no longer block exiting
        when an exception occurs in the main thread.
    - update to 0.5.0:
      * Fix a bug where READ and WRITE in zlib_ng.gzip_ng were
        inconsistent with the values in gzip on Python 3.13
      * Small simplifications to the ``gzip_ng.compress`` and
        ``gzip_ng.decompress`` functions, which should lead to less
        overhead.
    - update to 0.4.3:
      * Fix a bug where files larger than 4GB could not be
        decompressed.
    - update to 0.4.2:
      * Fix a reference counting error that happened on module
        initialization and triggered an error in the CPython debug
        build.
      * Fix a setup.py error that was triggered on MacOS ARM64.
    
    - bui