Update classifiers in pyproject.toml

pyproject.toml

@@ -13,7 +13,7 @@ readme = "README.md"
 requires-python = ">=3.7"
 classifiers = [
     "Programming Language :: Python :: 3",
-    "License :: OSI Approved :: MIT License",
+    "License :: OSI Approved :: BSD License",
     "Operating System :: OS Independent",
 ]
 dependencies = [