Fix typo

RELEASING.md

@@ -7,7 +7,7 @@ Releasing
  4. `git commit -am "Prepare for release X.Y.Z."` (where X.Y.Z is the new version)
  5. `./gradlew clean uploadArchives`.
  6. Visit [Sonatype Nexus](https://oss.sonatype.org/) and promote the artifact.
- 7. `git tag -a X.Y.X -m "Version X.Y.Z"` (where X.Y.Z is the new version)
+ 7. `git tag -a X.Y.Z -m "Version X.Y.Z"` (where X.Y.Z is the new version)
  8. Update the `gradle.properties` to the next SNAPSHOT version.
  9. `git commit -am "Prepare next development version."`
  10. `git push && git push --tags`