📚 Added: MongoDB (NoSQL) 'Introduction to MongoDB' by MongoDB University (#10019)

* 📚 Added: MongoDB (NoSQL) 'Introduction to MongoDB' by MongoDB University

* fix: Lint Error

* Removed : course link

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Co-authored-by: root <root@Anandu.localdomain>

courses/free-courses-en.md

@@ -509,6 +509,7 @@
 #### NoSQL
 
 * [Datastax Academy (Apache Cassandra)](https://www.datastax.com/dev/academy) - Datastax Inc. *(email address required)*
+* [Introduction to MongoDB](https://learn.mongodb.com/learn/learning-path/introduction-to-mongodb) - MongoDB University *(registration required)*
 * [MongoDB University](https://university.mongodb.com) - MongoDB, Inc. (email address *required*)
 * [Neo4j (Graph Database) Crash Course](https://www.youtube.com/watch?v=8jNPelugC2s) - Laith Academy
 * [Neo4j Graph Database Tutorial](https://www.youtube.com/playlist?list=PLqfPEK2RTgChcOZ6qHgSfwiBPCz2Bzdjh) - Satish C J