Update dependency io.quarkiverse.openapi.generator:quarkus-openapi-generator to v2.8.1

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

java-components/pom.xml

@@ -187,7 +187,7 @@
             <dependency>
                 <groupId>io.quarkiverse.openapi.generator</groupId>
                 <artifactId>quarkus-openapi-generator</artifactId>
-                <version>2.4.7</version>
+                <version>2.8.1</version>
             </dependency>
             <dependency>
                 <groupId>io.quarkiverse.mavenresolver</groupId>