Add explicit tag to push command (#423)

Author: TimvdLippe

RELEASING.md

@@ -5,8 +5,8 @@ to Sonatype snapshot repo at https://s01.oss.sonatype.org/content/repositories/s
 2. In order to release a non-snapshot version to Maven Central push an annotated tag, for example:
 ```
 git tag -a -m "Release 3.4.5" 3.4.5
-git push
+git push origin 3.4.5
 ```
 3. At the moment, you **may not create releases from GitHub Web UI**.
 Doing so will make the CI build fail because the CI creates the changelog and posts to GitHub releases.
-In the future supporting this would be nice but currently please make releases by pushing from CLI.
+In the future supporting this would be nice but currently please make releases by pushing from CLI.