Add myself as the PS4/PS5 code owner

Author: jmorse

llvm/CODE_OWNERS.TXT

@@ -196,9 +196,9 @@ N: Philip Reames
 E: [email protected]
 D: IndVar Simplify, Scalar Evolution
 
-N: Paul Robinson
-E: paul.robinson@sony.com
-D: Sony PlayStation®4 support
+N: Jeremy Morse
+E: jeremy.morse@sony.com
+D: Sony PlayStation®4 and PlayStation®5 support
 
 N: Chad Rosier
 E: [email protected]