Bump org.openapi.generator from 7.4.0 to 7.8.0

Bumps org.openapi.generator from 7.4.0 to 7.8.0.

---
updated-dependencies:
- dependency-name: org.openapi.generator
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -1,7 +1,7 @@
 [versions]
 spring-boot = "3.3.0"
 spring-dependency-management = "1.1.5"
-openapi-generator = "7.4.0"
+openapi-generator = "7.8.0"
 openapi-tools = "0.2.6"
 swagger = "2.2.22"
 swagger-request-validator = "2.40.0"