python3-msgpack: Update to version 1.0.8

python3-msgpack: Update to version 1.0.8

- Update from version 1.0.7 to 1.0.8
- Update of rootfile
- borgbackup now works with version 1.0.8 of msgpack
- Changelog
    1.0.8
	    exclude C/Cython files from wheel by @methane in #577
	    Build pure Python wheel for minor architectures.
	    update Cython to 3.0.8 by @methane in #581
	        This fixes memory leak when iterating over Unpacker on Python 3.12.

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>