docs: update README.md (#1107)

Author: azlekov

README.md

@@ -7,7 +7,7 @@
 [![Sponsors on Open Collective](https://opencollective.com/parse-server/sponsors/badge.svg)][open-collective-link]
 [![Twitter Follow](https://img.shields.io/twitter/follow/ParsePlatform.svg?label=Follow%20us%20on%20Twitter&style=social)](https://twitter.com/intent/follow?screen_name=ParsePlatform)
 
-A library that gives you access to the powerful Parse cloud platform from your Android app.
+A library that gives you access to the powerful Parse Server backend from your Android app.
 For more information about Parse and its features, see [the website](https://parseplatform.org/), [getting started][guide], and [blog](https://blog.parseplatform.org/).
 
 ## Dependency