KB66 PostResource#postComment: Return Uni<Response>.

Change-Id: I58ea7a2abd24b2f45b80f401ad0506a698993a9b
diff --git a/pom.xml b/pom.xml
index bacda3e..b4ed900 100644
--- a/pom.xml
+++ b/pom.xml
@@ -173,6 +173,10 @@
     </dependency>
     <dependency>
       <groupId>io.quarkus</groupId>
+      <artifactId>quarkus-resteasy-mutiny</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>io.quarkus</groupId>
       <artifactId>quarkus-resteasy-qute</artifactId>
     </dependency>
     <dependency>