update 1.5 Readme with new v2 version 2.2.22

README.md

@@ -33,7 +33,7 @@ The OpenAPI Specification has undergone several revisions since initial creation
 
 Swagger core Version      | Release Date | OpenAPI Spec compatibility | Notes | Status
 ------------------------- |--------------| -------------------------- | ----- | ----
-2.2.21 (**current stable**)| 2024-03-20   | 3.x           | [tag v2.2.21](https://github.com/swagger-api/swagger-core/tree/v2.2.21) | Supported
+2.2.21                     | 2024-03-20   | 3.x           | [tag v2.2.21](https://github.com/swagger-api/swagger-core/tree/v2.2.21) | Supported
 2.2.20                     | 2023-12-19   | 3.x           | [tag v2.2.20](https://github.com/swagger-api/swagger-core/tree/v2.2.20) | Supported
 2.2.19                     | 2023-11-10   | 3.x           | [tag v2.2.19](https://github.com/swagger-api/swagger-core/tree/v2.2.19)                                           | Supported
 2.2.18                     | 2023-10-25   | 3.x           | [tag v2.2.18](https://github.com/swagger-api/swagger-core/tree/v2.2.18)                                           | Supported