Fix small mistake in pyproject.toml

Author: binyamin555

pyproject.toml

@@ -4,7 +4,7 @@ version = "0.1.3"
 description = "A small library to ease the creation, usage, serialization and deserialization of C structs."
 authors = ["Binyamin Y Cohen <binyamincohen555@gmail.com>"]
 repository = "https://github.com/xpodev/quickstruct"
-readme = "README.rst"
+readme = "README.md"
 
 [tool.poetry.dependencies]
 python = "^3.8"