Update configuring-playbook.md: move a link for docs/configuring-playbook-bot-postmoogle.md to Bots section

The document (on 9c2a8addee93910cb9079f856bc3fb3932592c91; initial commit to add Postmoogle) says:
> Postmoogle is a bot/bridge you can use to forward emails to Matrix rooms

Therefore it is not really incorrect to categorize Postmoogle as bridge document-wise, but since the list on README.md categorizes it as a bot, and based on the file name of the documentation, this commit moves the link for Postmoogle to the Bots section.

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

docs/configuring-playbook.md

@@ -167,8 +167,6 @@ When you're done with all the configuration you'd like to do, continue with [Ins
 
 - [Setting up Email2Matrix](configuring-playbook-email2matrix.md) (optional)
 
-- [Setting up Postmoogle email bridging](configuring-playbook-bot-postmoogle.md) (optional)
-
 - [Setting up Matrix SMS bridging](configuring-playbook-bridge-matrix-bridge-sms.md) (optional)
 
 - [Setting up Heisenbridge bouncer-style IRC bridging](configuring-playbook-bridge-heisenbridge.md) (optional)
@@ -188,6 +186,8 @@ When you're done with all the configuration you'd like to do, continue with [Ins
 
 - [Setting up Honoroit](configuring-playbook-bot-honoroit.md) - a helpdesk bot (optional)
 
+- [Setting up Postmoogle email bridging](configuring-playbook-bot-postmoogle.md) (optional)
+
 - [Setting up Mjolnir](configuring-playbook-bot-mjolnir.md) - a moderation tool/bot (optional)
 
 - [Setting up Draupnir](configuring-playbook-bot-draupnir.md) - a moderation tool/bot, forked from Mjolnir and maintained by its former leader developer (optional)