graphics/qgis: Update to 3.38.3

Changelog: https://qgis.org/project/visual-changelogs/visualchangelog338/

https://github.com/qgis/QGIS/compare/final-3_38_2%5E...final-3_38_3

Reported by: portscout, Repology
MFH: 2024Q3

(cherry picked from commit e1f891fdb8ee84bb26787d8decff2753f27b9b00)