correct CHANGELOG

[skip ci]

CHANGELOG.md

@@ -25,8 +25,8 @@
 * `NodeSet#each` now returns `self` instead of zero. [#1822] (Thanks, @olehif!)
 * [MRI] Address a memory leak when using XML::Builder to create nodes with namespaces. [#1810]
 * [MRI] Address a memory leak when unparenting a DTD. [#1784] (Thanks, @stevecheckoway!)
-* [MRI] Decrease large memory usage when making nested XPath queries. [#1749]
 * [MRI] Use RbConfig::CONFIG instead of ::MAKEFILE_CONFIG to fix installations that use Makefile macros. [#1820] (Thanks, @nobu!)
+* [JRuby] Decrease large memory usage when making nested XPath queries. [#1749]
 * [JRuby] Fix failing tests on JRuby 9.2.x
 * [JRuby] Fix default namespaces in nodes reparented into a different document [#1774]
 * [JRuby] Fix support for Java 9. [#1759] (Thanks, @Taywee!)