Fix capitalization: Sliding Sync Proxy → Sliding Sync proxy

Based on MSC3575

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

docs/configuring-playbook-sliding-sync-proxy.md

@@ -1,4 +1,4 @@
-# Setting up Sliding Sync Proxy (optional)
+# Setting up Sliding Sync proxy (optional)
 
 The playbook can install and configure [sliding-sync](https://github.com/matrix-org/sliding-sync) proxy for you.
 
@@ -60,8 +60,8 @@ matrix_sliding_sync_database_name: 'matrix_sliding_sync'
 
 ## Usage
 
-You **don't need to do anything special** to make use of the Sliding Sync Proxy. Simply open your client which supports Sliding Sync (like Element X) and log in.
+You **don't need to do anything special** to make use of the Sliding Sync proxy. Simply open your client which supports Sliding Sync (like Element X) and log in.
 
 When the Sliding Sync proxy is [installed](#installing), your `/.well-known/matrix/client` file is also updated. A new `org.matrix.msc3575.proxy` section and `url` property are added there and made to point to your Sliding Sync proxy's base URL (e.g. `https://matrix.example.com/sliding-sync`).
 
-This allows clients which support Sliding Sync to detect the Sliding Sync Proxy's URL and make use of it.
+This allows clients which support Sliding Sync to detect the Sliding Sync proxy's URL and make use of it.

docs/configuring-playbook.md

@@ -224,7 +224,7 @@ 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 the Sliding Sync Proxy](configuring-playbook-sliding-sync-proxy.md) for clients which require Sliding Sync support (like Element X) (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)