Bump jackson version

Author: lesserwhirls

gradle/ncj.libs.versions.toml

@@ -11,7 +11,7 @@ bounce = "0.18"
 grpc = "1.73.0"
 guava = "33.4.8-jre"
 httpcomponents = "4.5.13"
-jackson = "2.19.1"
+jackson = "2.21.1"
 jcommander = "1.78"
 jdom2 = "2.0.6.1"
 jfree-jcommon = "1.0.23"