upgrade jackson to 2.15.2

Author: jsvd

versions.yml

@@ -27,6 +27,6 @@ jruby:
 # Note: this file is copied to the root of logstash-core because its gemspec needs it when
 #       bundler evaluates the gemspec via bin/logstash
 # Ensure Jackson version here is kept in sync with version used by jrjackson gem
-jrjackson: 0.4.17
-jackson: 2.14.1
-jackson-databind: 2.14.1
+jrjackson: 0.4.18
+jackson: 2.15.2
+jackson-databind: 2.15.2