Add comment about SyntaxError in 0.js

Author: moses77-boop

Sprint-3/1-key-errors/0.js

@@ -5,6 +5,7 @@
 
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
+// Error message interpreted ====> The error message simply means the name 'str' was declared twice in the same scope
 
 function capitalise(str) {
   let str = `${str[0].toUpperCase()}${str.slice(1)}`;