Fix Urllib instrumentation - Add status code to span if not None (open-telemetry#1430)

Author: shalevr

CHANGELOG.md

@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+### Fixed
+
+- Fix bug in Urllib instrumentation - add status code to span attributes only if the status code is not None. 
+  ([#1430](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/1430))
+
 ## Version 1.14.0/0.35b0 (2022-11-03)
 
 ### Deprecated