Also ignore the upcoming Jakarta classes

I was working on moving Bean Validation to a "jakarta." package and
stumbled upon this one. Let's prepare for it because there's a good
chance we will miss that one.

devtools/reflection-agent/src/main/java/io/quarkus/agent/ReflectionAgent.java

@@ -34,6 +34,7 @@ public class ReflectionAgent {
                 if (className.startsWith("io/quarkus/agent")
                         || className.startsWith("java/")
                         || className.startsWith("javax/")
+                        || className.startsWith("jakarta/")
                         || className.startsWith("jdk/")
                         || className.startsWith("sun/")
                         || className.startsWith("org/jboss/log")) {