Give an hint on instrument registration conflict that the other one will be used

Author: xrmx

opentelemetry-api/src/opentelemetry/metrics/_internal/__init__.py

@@ -289,7 +289,7 @@ def _log_instrument_registration_conflict(
         _logger.warning(
             "An instrument with name %s, type %s, unit %s and "
             "description %s has been created already with a "
-            "different advisory value %s.",
+            "different advisory value %s and will be used instead.",
             name,
             Counter.__name__,
             unit,