fix(requests): Fix wrong time unit for duration histogram (open-telemetry#2553)

Author: stollero

CHANGELOG.md

@@ -58,9 +58,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   ([#2524](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/2524))
 - `opentelemetry-instrumentation-asyncio` Check for __name__ attribute in the coroutine
   ([#2521](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/2521))
+- `opentelemetry-instrumentation-requests` Fix wrong time unit for duration histogram
+  ([#2553](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/2553))
 - `opentelemetry-util-http` Preserve brackets around literal IPv6 hosts ([#2552](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/2552))
 
-
 ## Version 1.24.0/0.45b0 (2024-03-28)
 
 ### Added

instrumentation/opentelemetry-instrumentation-requests/src/opentelemetry/instrumentation/requests/__init__.py

@@ -229,9 +229,7 @@ def get_or_create_headers():
                     exception = exc
                     result = getattr(exc, "response", None)
                 finally:
-                    elapsed_time = max(
-                        round((default_timer() - start_time) * 1000), 0
-                    )
+                    elapsed_time = max(default_timer() - start_time, 0)
 
             if isinstance(result, Response):
                 span_attributes = {}