mail/fetchmail: update to 6.5.3

BUGFIXES:

• IMAP: Reinstate workaround for missing IDLE support if --idle is requested. This had been a long-standing feature but got broken in fetchmail 6.4.22 (commit 616e8c70). Thanks to Lukáš Tesař for the detailed report including a Git bisect that identified this faulty commit. Fixes Gitlab issue #69.
• IMAP: Only print 'will idle after poll' if --idle is enabled and either offered by the server, or forced through --forceidle. This fixes a regression introduced in fetchmail 6.4.22 (commit 616e8c70).

TRANSLATIONS: fetchmail's translation was updated, courtesy of:

• es: Cristian Othón Martínez Vera [Spanish]

PR: 287435
MFH: 2025Q2
Approved by: Corey Halpin (maintainer)