Fix typos

Signed-off-by: Ryan Levick <[email protected]>

Author: rylev

wit/preview2/world.wit

@@ -1,18 +1,18 @@
 package fermyon:spin@2.0.0
 
-// All worlds the Spin host supports
+/// All worlds the Spin host supports
 world host {
   include fermyon:spin/host
   include platform
 }
 
-// The full world of a guest targeting an http-trigger
+/// The full world of a guest targeting an http-trigger
 world http-trigger {
   include platform
-  export wasi:http/outgoing-handler@0.2.0-rc-2023-10-18
+  export wasi:http/incoming-handler@0.2.0-rc-2023-10-18
 }
 
-// The imports needed for a guest to run on a Spin host
+/// The imports needed for a guest to run on a Spin host
 world platform {
   import wasi:http/outgoing-handler@0.2.0-rc-2023-10-18
   import llm