Document that WebFlux does not support forward redirects

Closes gh-33441

Author: bclozel

framework-docs/modules/ROOT/pages/web/webflux/dispatcher-handler.adoc

@@ -184,9 +184,11 @@ xref:web/webflux/reactive-spring.adoc#webflux-exception-handler[Exceptions] in t
 View resolution enables rendering to a browser with an HTML template and a model without
 tying you to a specific view technology. In Spring WebFlux, view resolution is
 supported through a dedicated xref:web/webflux/dispatcher-handler.adoc#webflux-resulthandling[HandlerResultHandler] that uses
-  `ViewResolver` instances to map a String (representing a logical view name) to a `View`
+`ViewResolver` instances to map a String (representing a logical view name) to a `View`
 instance. The `View` is then used to render the response.
 
+Web applications need to use a xref:web/webflux-view.adoc[View rendering library] to support this use case.
+
 
 [[webflux-viewresolution-handling]]
 === Handling
@@ -238,6 +240,9 @@ operate in terms of logical view names. A view name such as
 `redirect:/some/resource` is relative to the current application, while a view name such as
 `redirect:https://example.com/arbitrary/path` redirects to an absolute URL.
 
+NOTE: xref:web/webmvc/mvc-servlet/viewresolver.adoc#mvc-redirecting-forward-prefix[Unlike the Servlet stack],
+Spring WebFlux does not support "FORWARD" dispatches, so `forward:` prefixes are not supported as a result.
+
 
 [[webflux-multiple-representations]]
 === Content Negotiation