build(deps): bump org.openapitools:openapi-generator-maven-plugin (#162)

Bumps org.openapitools:openapi-generator-maven-plugin from 7.8.0 to 7.9.0.

---
updated-dependencies:
- 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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pom.xml

@@ -83,7 +83,7 @@
         <plugin>
           <groupId>org.openapitools</groupId>
           <artifactId>openapi-generator-maven-plugin</artifactId>
-          <version>7.8.0</version>
+          <version>7.9.0</version>
           <executions>
             <execution>
               <goals>