Add @miguelraz to reviewers and support sections (#42904)

Release Notes:

- N/A *or* Added/Fixed/Improved ...

REVIEWERS.conl

@@ -44,6 +44,7 @@ design
 
 docs
   = @probably-neb
+  = @miguelraz
 
 extension
   = @kubkon
@@ -98,6 +99,9 @@ settings_ui
   = @danilo-leal
   = @probably-neb
 
+support
+  = @miguelraz
+
 tasks
   = @SomeoneToIgnore
   = @Veykril