devel/glibmm26: update to 2.86.0
With recent update of devel/glib20 commit 944cdc82c7, this is update for
devel/glibmm26 to 2.86.0.
2.86.0 (stable) 2025-09-19: gmmproc: * tools/defs_gen/docextract: Improve extraction of enum enumerators. New enumerators in glib, gtk, pango are usually documented with one enumerator per documentation block. (Kjell Ahlstedt) 2.85.0 (unstable) 2025-08-31: Glib: * Date: Add get_week_of_year() and get_weeks_in_year(). (Kjell Ahlstedt) Gio: * InetAddress: Add get/property_scope_id(), get/property_flowinfo(), create(bytes, family, flowinfo, scope_id). * ZlibCompressor: Add get/set/property_os(). (Kjell Ahlstedt) Build: * Meson build: Use the Python installation that Meson uses. See merge request !67. * Require glib >= 2.85.2 (Kjell Ahlstedt)
PR: 295124