update README.md

Author: bluebill1049

README.md

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+## React Hook Form Resolvers
+
+This function allows you to use any external validation library such as Yup, Zod, Joi, Vest, Ajv and many others. The goal is to make sure you can seamlessly integrate whichever validation library you prefer. If you're not using a library, you can always write your own logic to validate your forms.
+
 ## Install
 
 Install your preferred validation library alongside `@hookform/resolvers`.