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

Bug: N/A
Test: N/A
Change-Id: Iacdf7cb2ce7081da5ecf26130bf2df2d684e2f58
diff --git a/packages/SystemUI/OWNERS b/packages/SystemUI/OWNERS
index fa855ab..546f0d2 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
 cinek@google.com
 cwren@google.com