math/saga: Update to 9.11.3

(skip v9.11.2 because of a missing fix)

Changelog: https://sourceforge.net/p/saga-gis/wiki/Changelog%209.11.3/attachment/changelog_saga_9.11.3.txt

		https://sourceforge.net/p/saga-gis/wiki/Changelog%209.11.2/attachment/changelog_saga_9.11.2.txt

Reported by: portscout, Repology
MFH: 2026Q1

(cherry picked from commit ec1c5f3ed2f88b096fb7d8354490673ff35c82cb)