Update RELEASING.md for syntax of markdown

Author: shiraji

RELEASING.md

@@ -1,4 +1,4 @@
-* "export JAVA_HOME=`/usr/libexec/java_home -v "1.8"`;./gradlew prepareForRelease" (In case stop releasing after running this command, make sure removing `.travis/release`)
+* ``export JAVA_HOME=`/usr/libexec/java_home -v "1.8"`;./gradlew prepareForRelease`` (In case stop releasing after running this command, make sure removing `.travis/release`)
 * Add CHANGELOG.md to what changes for new version
 * Add plugin.xml change note
 ```xml
@@ -13,4 +13,4 @@
 ```
 * Commit & push changes
 * Check [travis ci](https://travis-ci.org/shiraji/permissions-dispatcher-plugin) to successfully release the module
-* Create Release Tag (Upload archive file as well)
+* Create Release Tag (Upload archive file as well)