Fix typo in CODEOWNERS

Currently, @yhwang only has ability to approve PRs one level deep.
Fix it so he can approve any PR in the UI module.

CODEOWNERS

@@ -52,7 +52,7 @@ CODEOWNERS @prestodb/team-tsc
 
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 # Presto Console UI
-/presto-main/src/main/resources/webapp/* @yhwang @prestodb/committers
+/presto-main/src/main/resources/webapp @yhwang @prestodb/committers
 
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 # Presto documentation