Improve response filter documentation

Close: quarkusio#36955
(cherry picked from commit 0528f8c)

docs/src/main/asciidoc/resteasy-reactive.adoc

@@ -2220,6 +2220,8 @@ class Filters {
 }
 ----
 
+Such a response filter will also be called for <<exception-mapping, handled>> exceptions.
+
 Your filters may declare any of the following parameter types:
 
 .Filter parameters
@@ -2236,7 +2238,7 @@ Your filters may declare any of the following parameter types:
 |A context object to access the current response
 
 |link:{jdkapi}/java/lang/Throwable.html[`Throwable`]
-|Any thrown exception, or `null` (only for response filters)
+|Any thrown and <<exception-mapping, handled>> exception, or `null` (only for response filters).
 
 |===
 
@@ -2317,6 +2319,11 @@ Now, whenever a REST method is invoked, the request will be logged into the cons
 2019-06-05 12:51:04,485 INFO  [org.acm.res.jso.LoggingFilter] (executor-thread-1) Request GET /fruits from IP 127.0.0.1
 ----
 
+[NOTE]
+====
+A `ContainerResponseFilter` will also be called for <<exception-mapping, handled>> exceptions.
+====
+
 === Readers and Writers: mapping entities and HTTP bodies
 
 [[readers-writers]]