Fix usage docs for confluent_kafka (#1400)

Author: jltvieira

Diff for: instrumentation/opentelemetry-instrumentation-confluent-kafka/src/opentelemetry/instrumentation/confluent_kafka/__init__.py

@@ -20,7 +20,7 @@
 
 ..code:: python
 
-    from opentelemetry.instrumentation.confluentkafka import ConfluentKafkaInstrumentor
+    from opentelemetry.instrumentation.confluent_kafka import ConfluentKafkaInstrumentor
     from confluent_kafka import Producer, Consumer
 
     # Instrument kafka
@@ -69,7 +69,7 @@ def instrument_producer(producer: Producer, tracer_provider=None)
                           def instrument_consumer(consumer: Consumer, tracer_provider=None)
 for example:
 .. code: python
-    from opentelemetry.instrumentation.confluentkafka import ConfluentKafkaInstrumentor
+    from opentelemetry.instrumentation.confluent_kafka import ConfluentKafkaInstrumentor
     from confluent_kafka import Producer, Consumer
 
     inst = ConfluentKafkaInstrumentor()