[DOXIASITETOOLS-304] Upgrade to Maven Reporting API 4.0.0-M6

Signed-off-by: dependabot[bot] <support@github.com>

This closes #105
diff --git a/doxia-integration-tools/pom.xml b/doxia-integration-tools/pom.xml
index 312953c..58110a5 100644
--- a/doxia-integration-tools/pom.xml
+++ b/doxia-integration-tools/pom.xml
@@ -36,7 +36,7 @@
     <dependency>
       <groupId>org.apache.maven.reporting</groupId>
       <artifactId>maven-reporting-api</artifactId>
-      <version>4.0.0-M5</version>
+      <version>4.0.0-M6</version>
     </dependency>
 
     <dependency>