build(deps): bump org.openapi.generator from 7.11.0 to 7.12.0

Bumps org.openapi.generator from 7.11.0 to 7.12.0.

---
updated-dependencies:
- dependency-name: org.openapi.generator
  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="3.6.5"
 node="22.14.0"
 modelixBuildtools="1.8.1"
-openapi = "7.11.0"
+openapi = "7.12.0"
 micrometer = "1.14.4"
 dokka = "2.0.0"
 detekt = "1.23.8"