update 1.5 Readme with new v2 version 2.2.28

Author: frantuma

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
 ------------------------- |--------------| -------------------------- |-------------------------------------------------------------------------------------------------------------------| ----
-2.2.27 (**current stable**)| 2024-12-11   | 3.x           | [tag v2.2.27](https://github.com/swagger-api/swagger-core/tree/v2.2.27)                                           | Supported
+2.2.27                     | 2024-12-11   | 3.x           | [tag v2.2.27](https://github.com/swagger-api/swagger-core/tree/v2.2.27)                                           | Supported
 2.2.26                     | 2024-11-18   | 3.x           | [tag v2.2.26](https://github.com/swagger-api/swagger-core/tree/v2.2.26)                                           | Supported
 2.2.25                     | 2024-10-02   | 3.x           | [tag v2.2.25](https://github.com/swagger-api/swagger-core/tree/v2.2.25)                                           | Supported
 2.2.24                     | 2024-09-23   | 3.x           | [tag v2.2.24](https://github.com/swagger-api/swagger-core/tree/v2.2.24)                                           | Supported