chore update readme

Author: takrishna

README.md

@@ -3546,7 +3546,7 @@ Other Style Guides
     const PRIVATE_VARIABLE = 'should not be unnecessarily uppercased within a file';
 
     // bad
-    export const thing_to_be_changed = 'should obviously be uppercased';
+    export const some_exported_constant = 'should obviously be uppercased';
 
     // bad
     export let REASSIGNABLE_VARIABLE = 'do not use let with uppercase variables';