fix: fix license classifier (#81)

Looks good :) thanks

Author: joostlek

pyproject.toml

@@ -3,7 +3,7 @@ name = "xiaomi-ble"
 version = "0.30.0"
 description = "Manage Xiaomi BLE devices"
 authors = ["John Carr <john.carr@unrouted.co.uk>"]
-license = "Apache Software License 2.0"
+license = "Apache-2.0"
 readme = "README.md"
 repository = "https://github.com/bluetooth-devices/xiaomi-ble"
 documentation = "https://xiaomi-ble.readthedocs.io"