fixing links in the handler/trace doc

Signed-off-by: Lewis Birks <22620804+lewisbirks@users.noreply.github.com>

Author: lewisbirks

docs/asciidoc/handlers/trace.adoc

@@ -5,13 +5,13 @@ Jooby doesn't support `HTTP Trace` requests by default. To support them you have
 - Use the built-in `TraceHandler`
 - Write your own trace handler
 
-The javadoc:TraceHandler[] supports `TRACE` requests over existing handlers.
+The javadoc:handler.TraceHandler[] supports `TRACE` requests over existing handlers.
 
 .Head Example
 [source, java, role = "primary"]
 ----
 import io.jooby.Jooby;
-import io.jooby.TraceHandler;
+import io.jooby.handler.TraceHandler;
 ...
 {
   
@@ -27,7 +27,7 @@ import io.jooby.TraceHandler;
 [source, kotlin, role = "secondary"]
 ----
 import io.jooby.Jooby
-import io.jooby.TraceHandler
+import io.jooby.handler.TraceHandler
 ...
 {
   use(TraceHandler())      <1>