Log Message:
py-mercurial: update to 6.6.2.

Mercurial 6.6.2

    histedit: remove superfluous echo() and endwin() calls (issue6859)
    persistent-nodemap: avoid writing nodemap for empty revlog
    persistent-nodemap: respect the mmap setting when refreshing data
    bundle: do not detect --base argument that match nothing as lack of argument
    narrow: prevent removal of ACL-defined excludes
    pycompat: fix bytestr(bytes) in Python 3.11