[chore][receiver/kafkametrics] Added supported versions section (#33345)

**Description:** Based on the tests performed on Splunk distribution using Kafkametrics receiver. Closes #33206 --------- Co-authored-by: Curtis Robert <[email protected]>
open-telemetry · Jul 4, 2024 · f5d54da · f5d54da
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diff --git a/receiver/kafkametricsreceiver/README.md b/receiver/kafkametricsreceiver/README.md
@@ -15,6 +15,12 @@
 Kafka metrics receiver collects kafka metrics (brokers, topics, partitions, consumer groups) from kafka server,
 converting into otlp.
 
+## Prerequisites
+
+This receiver supports Kafka versions:
+  -  2.X
+  -  3.X
+
 ## Getting Started
 
 Required settings (no defaults):