Fix README filename

Author: dannywillems

pyproject.toml

@@ -5,7 +5,7 @@ license = "MIT"
 description = "l9format is a schema declaration targeted at interoperability between network recon tools used at LeakIX"
 authors = ["Danny Willems <danny@leakix.net>"]
 maintainers = ["Danny Willems <danny@leakix.net>"]
-readme = "READNE.md"
+readme = "README.md"
 homepage = "https://github.com/leakix/l9format-python"
 repository = "https://github.com/leakix/l9format-python"
 documentation = "https://github.com/leakix/l9format-python"