[Issue 6111][Doc] Add documentation for Debezium Mongodb connector
Fixes
### Motivation
Add Debezium Mongodb for io-connectors .
### Modifications
@@ -37,6 +37,14 @@ Pulsar has various source connectors, which are sorted alphabetically as below.
* [Java class](https://github.com/apache/pulsar/blob/master/pulsar-io/debezium/postgres/src/main/java/org/apache/pulsar/io/debezium/postgres/DebeziumPostgresSource.java)
+### Debezium MongoDB
+
+* [Configuration](io-debezium-source.md#configuration)
+
+* [Example](io-debezium-source.md#example-of-mongodb)
+
+* [Java class](https://github.com/apache/pulsar/blob/master/pulsar-io/debezium/mongodb/src/main/java/org/apache/pulsar/io/debezium/mongodb/DebeziumMongoDbSource.java)
+
### File
