Merge pull request #519 from blockstack/GinaAbrams-patch-7

Update app-rankings.md

_develop/app-rankings.md

@@ -3,6 +3,10 @@ layout: learn
 description: Blockstack app mining documentation
 permalink: /:collection/:path.html
 ---
+**This is outdated documentation for the App Mining program. App Mining Has Been Paused. 
+Thank you to the hundreds of you that participated and congratulations to our winners.**
+[More info](https://blog.blockstack.org/the-next-phase-of-app-mining/) & [all apps →](https://app.co/blockstack)
+
 # How scores become rankings
 {:.no_toc}