fixup: use correct readme name in pyproject.toml

Author: RonnyPfannschmidt

pyproject.toml

@@ -18,7 +18,7 @@ backend-path = [
 [project]
 name = "setuptools-scm"
 description = "the blessed package to manage your versions by scm tags"
-readme = "README.rst"
+readme = "README.md"
 license.file = "LICENSE"
 authors = [
     {name="Ronny Pfannschmidt", email="[email protected]"}