build(deps): bump org.openapi.generator from 7.14.0 to 7.15.0

Bumps org.openapi.generator from 7.14.0 to 7.15.0.

---
updated-dependencies:
- dependency-name: org.openapi.generator
  dependency-version: 7.15.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -33,7 +33,7 @@ ignite="2.17.0"
 apacheCxf="3.6.8"
 node="22.18.0"
 modelixBuildtools="1.9.0"
-openapi = "7.14.0"
+openapi = "7.15.0"
 micrometer = "1.15.3"
 detekt = "1.23.8"
 xmlunit = "2.10.3"