Edit name validation to alphaNumeric

Author: zaelgohary

packages/playground/src/weblets/tf_staticwebsite.vue

@@ -18,7 +18,7 @@
         :value="name"
         :rules="[
           validators.required('Name is required.'),
-          validators.IsAlphanumericExpectUnderscore('Name should consist of letters ,numbers and underscores only.'),
+          validators.isAlphanumeric('Name should consist of letters and numbers only.'),
           (name: string) => validators.isAlpha('Name must start with an alphabetical character.')(name[0]),
           validators.minLength('Name must be at least 2 characters.', 2),
           validators.maxLength('Name cannot exceed 15 characters.', 15),