Updated Upstream (Paper)

Upstream has released updates that appear to apply and compile correctly

Paper Changes:
PaperMC/Paper@6cfa2f7f [ci/skip] Add missing nullability annotation to sendEquipmentChange method (#12112)

Author: granny

gradle.properties

@@ -2,7 +2,7 @@ group = org.purpurmc.purpur
 version = 1.21.4-R0.1-SNAPSHOT
 
 mcVersion = 1.21.4
-paperCommit = 46f4fdaae3661941ac86f2157e625d907fdd8e81
+paperCommit = 6cfa2f7f315cbad23d7b12984b751f2721b496b6
 
 org.gradle.configuration-cache = true
 org.gradle.caching = true