Use specific Open Liberty version with Liberty Maven Plugin

pom.xml

    <properties>
        <liberty.runtime.version>21.0.0.5</liberty.runtime.version>
    </properties>

or
    <build>
        <plugins>         
            <plugin>
                <groupId>io.openliberty.tools</groupId>
                <artifactId>liberty-maven-plugin</artifactId>
                <version>3.3.4</version>
                <configuration>
                    <libertyRuntimeVersion>21.0.0.5</libertyRuntimeVersion>
                </configuration>
            </plugin>
        </plugins>
    </build>