Fix spec link

README.md

@@ -3,7 +3,7 @@ An API to programmatically generate memes based solely on requested URLs.
 <span class="badges"><!-- badges -->
 [![Build Status](https://img.shields.io/circleci/build/github/jacebrowning/memegen)](https://circleci.com/gh/jacebrowning/memegen)
 [![Coverage Status](http://img.shields.io/coveralls/jacebrowning/memegen/main.svg)](https://coveralls.io/r/jacebrowning/memegen)
-[![Swagger Validator](https://img.shields.io/swagger/valid/3.0?label=docs&specUrl=https%3A%2F%2Fapi.memegen.link%2Fdocs%2Fswagger.json)](https://api.memegen.link/docs/)
+[![Swagger Validator](https://img.shields.io/swagger/valid/3.0?label=docs&specUrl=https%3A%2F%2Fapi.memegen.link%2Fdocs%2Fopenapi.json)](https://api.memegen.link/docs/)
 [![License](https://img.shields.io/badge/license-mit-blue)](https://github.com/jacebrowning/memegen/blob/main/LICENSE.txt)
 [![GitHub Sponsors](https://img.shields.io/endpoint?url=https://memecomplete.com/api/memes/badge.json)](https://github.com/sponsors/jacebrowning)
 </span>