Update README.md with new release date of 7.9.0

Author: wing328

README.md

@@ -129,7 +129,7 @@ The OpenAPI Specification has undergone 3 revisions since initial creation in 20
 
 | OpenAPI Generator Version                                                                                                                                 | Release Date | Notes                                             |
 | --------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------ | ------------------------------------------------- |
-| 7.9.0 (upcoming minor release) [SNAPSHOT](https://oss.sonatype.org/content/repositories/snapshots/org/openapitools/openapi-generator-cli/7.9.0-SNAPSHOT/) | 23.09.2024   | Minor release with breaking changes (with fallback) |
+| 7.9.0 (upcoming minor release) [SNAPSHOT](https://oss.sonatype.org/content/repositories/snapshots/org/openapitools/openapi-generator-cli/7.9.0-SNAPSHOT/) | 07.10.2024   | Minor release with breaking changes (with fallback) |
 | [7.8.0](https://github.com/OpenAPITools/openapi-generator/releases/tag/v7.8.0) (latest stable release)                                                    | 19.08.2024   | Minor release with breaking changes (with fallback) |
 | [6.6.0](https://github.com/OpenAPITools/openapi-generator/releases/tag/v6.6.0)                                                    | 11.05.2023   | Minor release with breaking changes (with fallback) |
 | [5.4.0](https://github.com/OpenAPITools/openapi-generator/releases/tag/v5.4.0)                                                    | 31.01.2022   | Minor release with breaking changes (with fallback) |