fix(types): move py.typed to the right place

Author: dimaqq

py.typed renamed to otlp_json/py.typed

@@ -1,6 +1,6 @@
 [project]
 name = "otlp-json"
-version = "0.9.2"
+version = "0.9.3"
 description = "🐍Lightweight OTEL span to JSON converter, no dependencies, pure Python🐍"
 requires-python = ">=3.8"
 # https://github.com/astral-sh/uv/issues/4204