Deps: Bump smb2 for split-compound-response tolerance

Picks up https://github.com/vdavid/smb2 main 7f79392 ("Bugfix: Tolerate servers that split compound responses"), which makes `get_space_info`, `fs_info`, `stat`, `rename`, `read_file_compound`, and every other compound-using smb2 method transparently handle servers that return N responses across more than one transport frame instead of in one compound frame — a spec-legal behavior (MS-SMB2 3.3.4.1.3 says the server SHOULD compound but MAY split) that Samba (and thus QNAP, which runs Samba) exhibits in some scenarios.

User-visible effect: the `Invalid data: expected 3 compound responses, got 1` WARN that showed up against a QNAP NAS is gone — verified locally via a ~3-minute session on `/Volumes/naspi` with the space poller ticking every 5 s. The smb2 side also demotes the split-detection log from WARN to DEBUG since it's a spec edge case, not a problem to surface.

Author: vdavid