[CHORE] Update snap install instructions (#16720)

README.md

@@ -95,7 +95,7 @@ Install Rocket.Chat in seconds on Linux (Ubuntu and others) with:
 sudo snap install rocketchat-server
 ```
 
-[![Rocket.Chat Snap is recommended for Linux deployments](https://github.com/Sing-Li/bbug/raw/master/images/ubuntulogo.png)](https://uappexplorer.com/snap/ubuntu/rocketchat-server)
+[![Get it from the Snap Store](https://snapcraft.io/static/images/badges/en/snap-store-black.svg)](https://snapcraft.io/rocketchat-server)
 
 Installing snaps is very quick. By running that command you have your full Rocket.Chat server up and running. Snaps are secure. They are isolated with all of their dependencies. Snaps also auto-update when we release new versions.
 
@@ -134,15 +134,6 @@ Get your Rocket.Chat instance hosted in an "as a Service" style. You register an
 
 [![Rocket.Chat on IndieHosters](https://indie.host/signup.png)](https://indiehosters.net/shop/product/rocket-chat-21)
 
-## Ubuntu 16.04
-[![Ubuntu Apps Explorer](https://raw.githubusercontent.com/Sing-Li/bbug/master/images/uappexplorer.png)](https://uappexplorer.com/snap/ubuntu/rocketchat-server)
-
-Deploy from shell:
-
-`snap install rocketchat-server`
-
-In under 30 seconds, your Rocket.Chat server will be up and running at `http://host-ip:3000`
-
 ## Cloudron.io
 
 Install Rocket.Chat on [Cloudron](https://cloudron.io) Smartserver: