Bump org.openapitools:openapi-generator-maven-plugin from 6.6.0 to 7.9.0

Bumps org.openapitools:openapi-generator-maven-plugin from 6.6.0 to 7.9.0.

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

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

Author: dependabot[bot]

pom.xml

@@ -69,7 +69,7 @@
         <maven-compiler-plugin.version>3.10.1</maven-compiler-plugin.version>
         <maven-resources-plugin.version>3.2.0</maven-resources-plugin.version>
         <maven-surefire-plugin.version>3.1.2</maven-surefire-plugin.version>
-        <openapi-generator-maven-plugin.version>6.6.0</openapi-generator-maven-plugin.version>
+        <openapi-generator-maven-plugin.version>7.9.0</openapi-generator-maven-plugin.version>
         <springdoc-openapi-webflux-ui.version>1.2.32</springdoc-openapi-webflux-ui.version>
     </properties>