Fix license in pyproject.toml

Author: piotrm-nvidia

pyproject.toml

@@ -7,7 +7,7 @@ name = "alt-pytest-asyncio"
 dynamic = ["version"]
 description = "Alternative pytest plugin to pytest-asyncio"
 readme = "README.rst"
-license = "MIT"
+license = { text = "MIT" }
 requires-python = ">= 3.7"
 authors = [
     { name = "Stephen Moore", email = "[email protected]" },