updating code to handle misleading error in add product attribute screen by make error message more genric

Author: aman3103

lib/web/legacy-build.min.js

@@ -982,7 +982,7 @@
             function (v) {
                 return $.mage.isEmptyNoTrim(v) || /^[a-z]+[a-z0-9_]+$/.test(v);
             },
-            $.mage.__('Please use only letters (a-z), numbers (0-9) or underscore (_) in this field, and the first character should be a letter.') //eslint-disable-line max-len
+            $.mage.__('Please use only lowercase letters (a-z), numbers (0-9) or underscore (_) in this field, and the first character should be a letter.') //eslint-disable-line max-len
         ],
         'validate-alphanum': [
             function (v) {

lib/web/mage/validation.js

@@ -513,7 +513,7 @@ Validation.addAllThese([
     ['validate-alpha', 'Please use letters only (a-z or A-Z) in this field.', function (v) {
                 return Validation.get('IsEmpty').test(v) ||  /^[a-zA-Z]+$/.test(v)
             }],
-    ['validate-code', 'Please use only letters (a-z), numbers (0-9) or underscore (_) in this field, and the first character should be a letter.', function (v) {
+    ['validate-code', 'Please use only lowercase letters (a-z), numbers (0-9) or underscore (_) in this field, and the first character should be a letter.', function (v) {
                 return Validation.get('IsEmpty').test(v) ||  /^[a-z]+[a-z0-9_]+$/.test(v)
             }],
     ['validate-alphanum', 'Please use only letters (a-z or A-Z) or numbers (0-9) in this field. No spaces or other characters are allowed.', function(v) {