Fix changelog.xml

Author: spitzerd

changelog.xml

@@ -16,6 +16,7 @@
     <release version="18.5.0" date="upcoming">
       <action type="update">
         Update LanguageTool 6.4 (see [LT release notes](https://github.com/languagetool-org/languagetool/blob/v6.6/languagetool-standalone/CHANGES.md))
+      </action>
       <action type="update">
         Update to lsp-cli-plus 2.2.0. See [lsp-cli-plus release notes](https://github.com/ltex-plus/lsp-cli-plus/releases/tag/2.2.0).
       </action>