fix: get post types with "post" option

Author: etc-tiago

Diff for: packages/swr-openapi/src/mutate.ts

@@ -46,7 +46,7 @@ export function createMutateHook<Paths extends {}, IMediaType extends MediaType>
 
     return useCallback(
       function mutate<
-        Path extends PathsWithMethod<Paths, "get">,
+        Path extends PathsWithMethod<Paths, "post">,
         R extends TypesForGetRequest<Paths, Path>,
         Init extends R["Init"],
       >(