Update docs/configuring-playbook.md: add link to configuring-playbook-synapse-auto-accept-invite.md

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

docs/configuring-playbook.md

@@ -210,6 +210,8 @@ When you're done with all the configuration you'd like to do, continue with [Ins
 
 - [Setting up synapse-auto-compressor](configuring-playbook-synapse-auto-compressor.md) for compressing the database on Synapse homeservers (optional)
 
+- [Setting up Synapse Auto Invite Accept](configuring-playbook-synapse-auto-accept-invite.md) (optional)
+
 - [Setting up the Sliding Sync proxy](configuring-playbook-sliding-sync-proxy.md) for clients which require Sliding Sync support (like Element X) (optional)
 
 - [Setting up the Sygnal push gateway](configuring-playbook-sygnal.md) (optional)