Update configuring-playbook.md: sort list items

Signed-off-by: Suguru Hirahara <did🔑z6MkvVZk1A3KBApWJXv2Ju4H14ErDfRGxh8zxdXSZ4vACDg5>

docs/configuring-playbook.md

@@ -184,12 +184,12 @@ Bridges can be used to connect your Matrix installation with third-party communi
 
 - [Setting up Matrix SMS bridging](configuring-playbook-bridge-matrix-bridge-sms.md)
 
-- [Setting up Zulip bridging](configuring-playbook-bridge-zulip.md)
-
 - [Setting up Heisenbridge bouncer-style IRC bridging](configuring-playbook-bridge-heisenbridge.md)
 
 - [Setting up WeChat bridging](configuring-playbook-bridge-wechat.md)
 
+- [Setting up Zulip bridging](configuring-playbook-bridge-zulip.md)
+
 ### Bots
 
 Bots provide various additional functionality to your installation.