fix: sample path (#243)

Author: rambleraptor

aep/general/0144/aep.md.j2

@@ -157,7 +157,7 @@ subresource instead.
 
 {% tab oas %}
 
-{% sample 'add_remove.oas.yaml', '$.paths./publishers/{publisherId}/books/{bookId}:addAuthor.requestBody' %}
+{% sample 'add_remove.oas.yaml', '$.paths./publishers/{publisherId}/books/{bookId}:addAuthor.post.requestBody' %}
 
 - A field for the value being added or removed **must** be included. It
   **should** be the singular name of the field.