[Misc] Replace ccassidy@ with caitlinshk@ for SysUI OWNERS.

Bug: N/A
Test: N/A
Change-Id: I0e72779e89d35f4613837891ee7bd07d1afc1595
diff --git a/packages/SystemUI/OWNERS b/packages/SystemUI/OWNERS
index 7076ad9..9ef772e 100644
--- a/packages/SystemUI/OWNERS
+++ b/packages/SystemUI/OWNERS
@@ -13,7 +13,7 @@
 brockman@google.com
 brzezinski@google.com
 brycelee@google.com
-ccassidy@google.com
+caitlinshk@google.com
 chrisgollner@google.com
 dupin@google.com
 ethibodeau@google.com