Add OSI approved license classifier to pyproject.toml

Author: ianthomas23

pyproject.toml

@@ -17,6 +17,7 @@ classifiers = [
     "Framework :: Jupyter",
     "Intended Audience :: Developers",
     "Intended Audience :: Science/Research",
+    "License :: OSI Approved :: BSD License",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",