Merge #6968

6968: README: Add link to Matrix explanation r=Amejia481 a=pocmo
Co-authored-by: Sebastian Kaspari <s.kaspari@gmail.com>

README.md

@@ -21,7 +21,7 @@ Before you attempt to make a contribution please read the [Community Participati
 
 * [List of good first issues](https://github.com/mozilla-mobile/android-components/issues?q=is%3Aissue+is%3Aopen+label%3A%22good+first+issue%22) (**New contributors start here!**) and [List of "help wanted" issues](https://github.com/mozilla-mobile/android-components/issues?q=is%3Aissue+is%3Aopen+label%3A%22help+wanted%22).
 
-* Matrix: [android-components:mozilla.org chat room](https://chat.mozilla.org/#/room/#android-components:mozilla.org).
+* Matrix: [android-components:mozilla.org chat room](https://chat.mozilla.org/#/room/#android-components:mozilla.org) ([How to connect](https://wiki.mozilla.org/Matrix#Connect_to_Matrix)). 
 
 * Subscribe to our mailing list [android-components@](https://lists.mozilla.org/listinfo/android-components) to keep up to date ([Archives](https://lists.mozilla.org/pipermail/android-components/)).