minor fixes

Author: iliakan

1-js/02-first-steps/14-function-basics/article.md

@@ -277,7 +277,7 @@ function checkAge(age) {
   }
 }
 
-let ageCheck = prompt('How old are you?', 18);
+let age = prompt('How old are you?', 18);
 
 if ( checkAge(age) ) {
   alert( 'Access granted' );