MAGETWO-33443: Password strength validator on installation wizard works in over-exacting mode

- fixed message

Author: Olga Kopylova

setup/view/magento/setup/create-admin-account.phtml

@@ -16,7 +16,7 @@ $passwordWizard = sprintf(
         </div>
     <p>%s</p>',
     'Password Strength:',
-    'Enter a mix of at least 6 alpha-numeric characters. For a strong password, use numbers, symbols, and uppercase and lowercase letters (Ex: BuyIt$54).'
+    'Enter a mix of 6 or more numbers and letters. For a stronger password, include at least one small letter, big letter, and symbol (Ex: BuyIt$54).'
 );
 ?>