Announce mx-puppet-discord bridging support

Related to #540 (Github Pull Request).

docs/configuring-playbook-bridge-appservice-discord.md

@@ -1,5 +1,7 @@
 # Setting up Appservice Discord (optional)
 
+**Note**: bridging to [Discord](https://discordapp.com/) can also happen via the [mx-puppet-discord](configuring-playbook-bridge-mx-puppet-discord.md) bridge supported by the playbook.
+
 The playbook can install and configure [matrix-appservice-discord](https://github.com/Half-Shot/matrix-appservice-discord) for you.
 
 See the project's [documentation](https://github.com/Half-Shot/matrix-appservice-discord/blob/master/README.md) to learn what it does and why it might be useful to you.

docs/configuring-playbook-bridge-mx-puppet-discord.md

@@ -1,5 +1,7 @@
 # Setting up MX Puppet Discord (optional)
 
+**Note**: bridging to [Discord](https://discordapp.com/) can also happen via the [matrix-appservice-discord](configuring-playbook-bridge-appservice-discord.md) bridge supported by the playbook.
+
 The playbook can install and configure
 [mx-puppet-discord](https://github.com/matrix-discord/mx-puppet-discord) for you.
 

docs/configuring-playbook.md

@@ -105,6 +105,8 @@ When you're done with all the configuration you'd like to do, continue with [Ins
 
 - [Setting up MX Puppet Twitter bridging](configuring-playbook-bridge-mx-puppet-twitter.md) (optional)
 
+- [Setting up MX Puppet Discord bridging](configuring-playbook-bridge-mx-puppet-discord.md) (optional)
+
 - [Setting up Email2Matrix](configuring-playbook-email2matrix.md) (optional)
 
 - [Setting up Matrix SMS bridging](configuring-playbook-matrix-bridge-sms.md) (optional)