jmx-scraper document kafka-connect support (#2688)

Author: SylvainJuge

jmx-scraper/README.md

@@ -77,6 +77,7 @@ Supported values for `otel.jmx.target.system` and support for `otel.jmx.target.s
 | `jetty`                  | Eclipse Jetty         | [`jetty.yaml`](src/main/resources/jetty.yaml)                   | [`jetty.yaml`](https://github.com/open-telemetry/opentelemetry-java-instrumentation/blob/main/instrumentation/jmx-metrics/library/src/main/resources/jmx/rules/jetty.yaml) ([doc](https://github.com/open-telemetry/opentelemetry-java-instrumentation/blob/main/instrumentation/jmx-metrics/library/jetty.md))          |
 | `jvm`                    | JVM runtime metrics   | [`jvm.yaml`](src/main/resources/jvm.yaml)                       | [`jvm.yaml`](https://github.com/open-telemetry/opentelemetry-java-instrumentation/blob/main/instrumentation/jmx-metrics/library/src/main/resources/jmx/rules/jvm.yaml) ([doc](https://github.com/open-telemetry/opentelemetry-java-instrumentation/blob/main/instrumentation/jmx-metrics/library/jvm.md))                |
 | `kafka`                  | Apache Kafka          | [`kafka.yaml`](src/main/resources/kafka.yaml)                   |                                                                                                                                                                                                                                                                                                                          |
+| `kafka-connect`          | Kafka Connect         |                                                                 | [`kafka-connect.yaml`](https://github.com/open-telemetry/opentelemetry-java-instrumentation/blob/main/instrumentation/jmx-metrics/library/src/main/resources/jmx/rules/kafka-connect.yaml)                                                                                                                               |
 | `kafka-consumer`         | Apache Kafka consumer | [`kafka-consumer.yaml`](src/main/resources/kafka-consumer.yaml) |                                                                                                                                                                                                                                                                                                                          |
 | `kafka-producer`         | Apache Kafka producer | [`kafka-producer.yaml`](src/main/resources/kafka-producer.yaml) |                                                                                                                                                                                                                                                                                                                          |
 | `solr`                   | Apache Solr           | [`solr.yaml`](src/main/resources/solr.yaml)                     |                                                                                                                                                                                                                                                                                                                          |