README: License should refer to 'this project'

I copied the disclaimer from Serde, and forgot to change the reference.
I would make a terrible lawyer.

Author: Techcable

README.md

@@ -36,4 +36,4 @@ assert model.dump_python(OrderedSet([1,2,7,8])) == [1,2,7,8]
 ## License
 Licensed under either the [Apache 2.0 License](./LICENSE-APACHE.txt) or [MIT License](./LICENSE-MIT.txt) at your option.
 
-Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in Serde by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions. 
+Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in this project by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.