dependencies: bump openapi.generator.plugin.version

Bumps `openapi.generator.plugin.version` from 7.11.0 to 7.12.0.

Updates `org.openapitools:openapi-generator-cli` from 7.11.0 to 7.12.0

Updates `org.openapitools:openapi-generator-maven-plugin` from 7.11.0 to 7.12.0

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

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

pom.xml

@@ -69,7 +69,7 @@
         <maven.dependency.plugin.version>3.8.1</maven.dependency.plugin.version>
         <maven.surefire.plugin.version>3.5.2</maven.surefire.plugin.version>
         <maven.resources.plugin.version>3.3.1</maven.resources.plugin.version>
-        <openapi.generator.plugin.version>7.11.0</openapi.generator.plugin.version>
+        <openapi.generator.plugin.version>7.12.0</openapi.generator.plugin.version>
         <snakeyaml.version>2.2</snakeyaml.version>
         <json-schema-validator.version>1.5.6</json-schema-validator.version>
         <archunit.version>1.4.0</archunit.version>