docs: update swagger badge

README.md

@@ -1,7 +1,7 @@
 [![Build Status](https://github.com/interhyp/metadata-service/actions/workflows/go.yaml/badge.svg)](../../actions/workflows/go.yaml)
 [![GitHub go.mod Go version](https://img.shields.io/github/go-mod/go-version/interhyp/service-metadata)][release]
 [![GitHub Latest Stable Release](https://img.shields.io/github/v/release/interhyp/metadata-service?TODO?label=Stable)][release]
-[![Swagger](https://img.shields.io/badge/-Swagger-%23Clojure?style=for-the-badge&logo=swagger&logoColor=white)][swagger]
+[![Swagger Validator](https://img.shields.io/swagger/valid/3.0?label=swagger&specUrl=https%3A%2F%2Finterhyp.github.io%2Fmetadata-service%2Fopenapi-v3-spec.json)][swagger]
 [![Codecov](https://img.shields.io/codecov/c/github/interhyp/metadata-service?TODO?token=bBAfT3Wn89)](https://codecov.io/gh/interhyp/metadata-service)
 [![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/semantic-release/semantic-release)
 
@@ -253,4 +253,4 @@ The api docs URL is /v3/api-docs (in case the swagger ui does not automatically
 [vault-k8-auth]: https://www.vaultproject.io/docs/auth/kubernetes
 [vault-token-auth]: https://www.vaultproject.io/docs/auth/token
 [ecs]: https://www.elastic.co/guide/en/ecs/current/index.html
-[openid]: https://github.com/dexidp/dex
+[openid]: https://github.com/dexidp/dex