lang/go125: Update to 1.25.11
Changes:
go1.25.11 (released 2026-06-02) includes security fixes to the crypto/x509, mime, and net/textproto packages, as well as bug fixes to the compiler and the runtime.
MFH: 2026Q2
Reviewed by: adamw
Differential Revision: https://reviews.freebsd.org/D57406
(cherry picked from commit 329713ce942821d5fd5130fb37560765711aee17)