Bump org.openapitools:openapi-generator-maven-plugin from 7.7.0 to 7.9.0

Bumps org.openapitools:openapi-generator-maven-plugin from 7.7.0 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>

studymanager/pom.xml

@@ -227,7 +227,7 @@
             <plugin>
                 <groupId>org.openapitools</groupId>
                 <artifactId>openapi-generator-maven-plugin</artifactId>
-                <version>7.7.0</version>
+                <version>7.9.0</version>
                 <executions>
                     <execution>
                         <id>configurator-api</id>