Update dependency org.openrewrite.maven:rewrite-maven-plugin to v6

Author: renovate[bot]

pom.xml

@@ -191,7 +191,7 @@
             <plugin>
                 <groupId>org.openrewrite.maven</groupId>
                 <artifactId>rewrite-maven-plugin</artifactId>
-                <version>5.47.3</version>
+                <version>6.8.1</version>
                 <configuration>
                     <activeRecipes>
                         <recipe>org.openrewrite.java.testing.junit5.JUnit4to5Migration</recipe>