OJ-3601: Upgrade jackson

Author: barnabycollins

gradle/libs.versions.toml

@@ -3,7 +3,7 @@ aws_sdk_version = "2.41.25"
 aws_lambda_events_version = "3.11.6"
 aspectjrt_version = "1.9.20.1"
 aws_powertools_version = "2.9.0"
-jackson_version = "2.17.2"
+jackson_version = "2.21"
 nimbusds_oauth_version = "11.29.1"
 nimbusds_jwt_version = "10.5"
 junit = "5.10.3"