change repo pat from xenial-220 to xenial-22 (which will install 2.2.N)

Author: ffdixon

_posts/2019-02-15-install.md

@@ -357,11 +357,9 @@ This is because some files owned by `bbb-client` have moved to be owned by `bbb-
 Next, your server needs to know where to download the BigBlueButton 2.2 packages.  To configure the package repository, enter the following command:
 
 ```bash
-$ echo "deb https://ubuntu.bigbluebutton.org/xenial-220/ bigbluebutton-xenial main" | sudo tee /etc/apt/sources.list.d/bigbluebutton.list
+$ echo "deb https://ubuntu.bigbluebutton.org/xenial-22/ bigbluebutton-xenial main" | sudo tee /etc/apt/sources.list.d/bigbluebutton.list
 ```
 
-Note: The directory `xenial-220` points to the latest BigBlueButton 2.2.X packages.
-
 Next, run `apt-get` to pull down the links to the latest BigBlueButton packages.
 
 ```bash