(#2795) Update concurrent-ruby to latest to fix memory leak

Author: justinstoller

resources/ext/build-scripts/jruby-gem-list.txt

@@ -4,5 +4,5 @@ text 1.3.1
 locale 2.1.2
 gettext 3.2.2
 fast_gettext 1.1.2
-concurrent-ruby 1.1.5
+concurrent-ruby 1.2.2
 deep_merge 1.0.1