Update pyproject.toml

Co-authored-by: Alex Mazzeo <[email protected]>

Author: wagenrace

pyproject.toml

@@ -5,8 +5,8 @@ description = "Temporal.io Python SDK"
 authors = [{ name = "Temporal Technologies Inc", email = "[email protected]" }]
 requires-python = ">=3.10"
 readme = "README.md"
-License-Expression = "MIT"
-License-File = "LICENSE"
+license = "MIT"
+license-files = ["LICENSE"]
 keywords = ["temporal", "workflow"]
 dependencies = [
   "nexus-rpc==1.1.0",