fix(README): link to docs page for downloads

Author: msfjarvis

README.md

@@ -5,16 +5,7 @@
 
 ## Download
 
-<a href="https://play.google.com/store/apps/details?id=dev.msfjarvis.aps">
-  <img src="https://play.google.com/intl/en_us/badges/static/images/badges/en_badge_web_generic.png" 
-       alt="Get it on Google Play"
-       height="80" />
-</a>
-<a href="https://f-droid.org/packages/dev.msfjarvis.aps">
-  <img src="https://fdroid.gitlab.io/artwork/badge/get-it-on.png"
-       alt="Get it on F-Droid"
-       height="80" />
-</a>
+See https://docs.passwordstore.app/docs/users/release-channels/
 
 ## Documentation