[chore] Note that Java 8 usage is fixed in release notes

Was actually earlier fixed by 5eb518d

Fixes #324

Author: chadlwilson

History.md

@@ -1,5 +1,6 @@
 ## 1.2.5 (UNRELEASED)
 
+- Fix use of jruby-rack under Java 8 (#324)
 - Fix deprecated usages of JRuby runtime
 - Fix deprecated usages of Rack API