Update dependency org.openapitools:openapi-generator-maven-plugin to v7.16.0

Author: renovate[bot]

pom.xml

@@ -51,7 +51,7 @@
         <apache.tika.version>3.1.0</apache.tika.version>
         <hibernate.search>7.2.2.Final</hibernate.search>
         <icu4j.version>76.1</icu4j.version>
-        <openapi-generator-version>7.11.0</openapi-generator-version>
+        <openapi-generator-version>7.16.0</openapi-generator-version>
     </properties>