Update docs/index.rst

Co-authored-by: Djordy Koert <[email protected]>

docs/index.rst

@@ -378,7 +378,7 @@ that property type to not be nullable, for example.
 
          /**
           * But for updates, the `username` property will not be required
-          * @OA\RequestBody(content: @Model(type=UserDto::class, groups={"update"}))
+          * @OA\RequestBody(@Model(type=UserDto::class, groups={"update"}))
           */
 
     .. code-block:: php-attributes