Fixed broken links to core API headers (#6501)

development/cpp/core_types.rst

@@ -167,8 +167,8 @@ References:
 
 -  `core/templates/vector.h <https://github.com/godotengine/godot/blob/master/core/templates/vector.h>`__
 -  `core/templates/list.h <https://github.com/godotengine/godot/blob/master/core/templates/list.h>`__
--  `core/templates/set.h <https://github.com/godotengine/godot/blob/master/core/templates/set.h>`__
--  `core/templates/map.h <https://github.com/godotengine/godot/blob/master/core/templates/map.h>`__
+-  `core/templates/set.h <https://github.com/godotengine/godot/blob/master/core/templates/hash_set.h>`__
+-  `core/templates/map.h <https://github.com/godotengine/godot/blob/master/core/templates/hash_map.h>`__
 
 String
 ------