graphics/qgis-ltr: Fix broken patch naming
Accidentally, the patches in commit af60a61a9333df126249d5659c350c4a7b969a9a were named incorrectly.
Reported by: pkg-fallout
Fixes: af60a61a9333, Fix on CURRENT after llvm13 intro
MFH: 2021Q4
(cherry picked from commit eca1a49f0e033e30ebc3848aa8e0f4f4a9a805b2)