tag-deploy: push only the created tag
tag-deploy: push only the created tag

git push --tags would push any local tags missing on the upstream repo
to it. Instead just push the single tag we just created.

Change-Id: If221f8faceab86f9ab3df61b18e27678a43cfda4

wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps