Update docs/configuring-playbook.md: merge "Server connectivity" section to "Core service adjustments" section

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

docs/configuring-playbook.md

@@ -57,6 +57,11 @@ When you're done with all the configuration you'd like to do, continue with [Ins
 
   - [Setting up Dynamic DNS](configuring-playbook-dynamic-dns.md)
 
+- Server connectivity:
+  - [Enabling Telemetry for your Matrix server](configuring-playbook-telemetry.md)
+
+  - [Controlling Matrix federation](configuring-playbook-federation.md)
+
 - [Storing Matrix media files using matrix-media-repo](configuring-playbook-matrix-media-repo.md)
 
 - [Storing Synapse media files on Amazon S3 or another compatible Object Storage](configuring-playbook-s3.md)
@@ -87,12 +92,6 @@ When you're done with all the configuration you'd like to do, continue with [Ins
 
 - [Enabling synapse-usage-exporter for Synapse usage statistics](configuring-playbook-synapse-usage-exporter.md)
 
-### Server connectivity
-
-- [Enabling Telemetry for your Matrix server](configuring-playbook-telemetry.md)
-
-- [Controlling Matrix federation](configuring-playbook-federation.md)
-
 ### Authentication and user-related
 
 - [Setting up Matrix Authentication Service](configuring-playbook-matrix-authentication-service.md) (Next-generation auth for Matrix, based on OAuth 2.0/OIDC)