multimedia/x265: Refresh distfile

Footer in patch file x265-asm-warnings.patch now reports 2.46.0 instead
of 2.45.2 which causes a checksum mismatch

PR: 281101
Approved by: portmgr (blanket, build fix)

(cherry picked from commit d91a3bbe622bfd57a248bf81bc3aa7df5e525938)