Update classifier (#41670)

Author: kristapratico

sdk/communication/azure-communication-email/setup.py

@@ -51,7 +51,7 @@
     url="https://github.com/Azure/azure-sdk-for-python",
     keywords="azure, azure sdk",  # update with search keywords relevant to the azure service / product
     classifiers=[
-        "Development Status :: 5 - Production/Stable",
+        "Development Status :: 4 - Beta",
         "Programming Language :: Python",
         "Programming Language :: Python :: 3 :: Only",
         "Programming Language :: Python :: 3",