doc(example/README.md): fix broken link

rouson · web-flow · commit fd258dd7bdbe · 2022-09-26T19:36:33.000-07:00
diff --git a/example/README.md b/example/README.md
@@ -40,3 +40,5 @@ should produce the following output:
  smart_pointer_1 and smart_pointer_2 going out of scope
  free(): user_object deallocated
 ```
+
+[user_object_smart_pointer.f90]: user_object_smart_pointer.f90
