Update pyproject.toml - fix license

Author: bouwew

pyproject.toml

@@ -5,11 +5,11 @@ build-backend = "setuptools.build_meta"
 [project]
 name            = "plugwise_usb"
 version         = "v0.40.0a113"
+license         = "MIT"
 keywords        = ["home", "automation", "plugwise", "module", "usb"]
 classifiers     = [
     "Development Status :: 5 - Production/Stable",
     "Intended Audience :: Developers",
-    "License :: OSI Approved :: MIT License",
     "Operating System :: OS Independent",
     "Programming Language :: Python :: 3.13",
     "Topic :: Home Automation",