pyproject: fix license fields

pyproject.toml

@@ -6,14 +6,14 @@ build-backend = "setuptools.build_meta"
 name = "pipecat-ai"
 dynamic = ["version"]
 description = "An open source framework for voice (and multimodal) assistants"
-license = { text = "BSD 2-Clause License" }
+license = "BSD-2-Clause"
+license-files = ["LICENSE"]
 readme = "README.md"
 requires-python = ">=3.10"
 keywords = ["webrtc", "audio", "video", "ai"]
 classifiers = [
     "Development Status :: 5 - Production/Stable",
     "Intended Audience :: Developers",
-    "License :: OSI Approved :: BSD License",
     "Topic :: Communications :: Conferencing",
     "Topic :: Multimedia :: Sound/Audio",
     "Topic :: Multimedia :: Video",

src/pipecat/py.typed

@@ -1 +0,0 @@
-