Add links for mongodb and neo4j sinks

Author: dangusev

mkdocs.yml

@@ -53,6 +53,8 @@ nav:
         - Google Cloud Pub/Sub Sink: 'quix-streams/connectors/sinks/google-cloud-pubsub-sink.md'
         - InfluxDB v3 Sink: 'quix-streams/connectors/sinks/influxdb3-sink.md'
         - Local File Sink: 'quix-streams/connectors/sinks/local-file-sink.md'
+        - MongoDB Sink: 'quix-streams/connectors/sinks/mongodb-sink.md'
+        - Neo4j Sink: 'quix-streams/connectors/sinks/neo4j-sink.md'
         - PostgreSQL Sink: 'quix-streams/connectors/sinks/postgresql-sink.md'
         - Redis Sink: 'quix-streams/connectors/sinks/redis-sink.md'
         - Creating a Custom Sink: 'quix-streams/connectors/sinks/custom-sinks.md'