update 1.5 Readme with new v2 version 2.2.39 (#4996)

Co-authored-by: daniel-kmiecik <daniel-kmiecik@users.noreply.github.com>

Author: sonatypeoss[bot]

README.md

@@ -33,7 +33,8 @@ The OpenAPI Specification has undergone several revisions since initial creation
 
 Swagger core Version | Release Date | OpenAPI Spec compatibility | Notes | Status
 ------------------------- | ------------ | -------------------------- | ----- | ----
-2.2.38 (**current stable**)| 2025-09-29 | 3.x | [tag v2.2.38](https://github.com/swagger-api/swagger-core/tree/v2.2.38) | Supported
+2.2.39 (**current stable**)| 2025-10-13 | 3.x | [tag v2.2.39](https://github.com/swagger-api/swagger-core/tree/v2.2.39) | Supported
+2.2.38 | 2025-09-29 | 3.x | [tag v2.2.38](https://github.com/swagger-api/swagger-core/tree/v2.2.38) | Supported
 2.2.37 | 2025-09-16 | 3.x | [tag v2.2.37](https://github.com/swagger-api/swagger-core/tree/v2.2.37) | Supported
 2.2.36 | 2025-08-18 | 3.x | [tag v2.2.36](https://github.com/swagger-api/swagger-core/tree/v2.2.36) | Supported
 2.2.35 | 2025-07-31 | 3.x | [tag v2.2.35](https://github.com/swagger-api/swagger-core/tree/v2.2.35) | Supported