[DOC-13253]: Feedback on User Authentication | Couchbase Docs (#875)

Minor correction: Capitalized `Sync Gateway`

Author: RayOffiah

modules/ROOT/pages/_partials/_define_component_attributes.adoc

@@ -23,7 +23,7 @@
 :version_caoFull: 2.0.0
 
 // Couchbase Components
-:sgw: pass:q,a[sync{nbsp}gateway]
+:sgw: pass:q,a[Sync{nbsp}Gateway]
 :sgw-s: pass:q,a[Sync{nbsp}gateway]
 :sgw-t: pass:q,a[Sync{nbsp}Gateway]
 :sgw-te: pass:q,a[_{sgw-t}_]