🎨 fix download count position on setup/one (#801)

no issue
- default component tag of `<div>` forced the download count to appear
on it's own line, setting `tagName: ''` returns the desired inline
behaviour

ghost/admin/app/components/gh-download-count.js

@@ -10,6 +10,7 @@ export default Component.extend({
     ajax: injectService(),
     ghostPaths: injectService(),
 
+    tagName: '',
     count: '',
 
     _poll: task(function* () {