Bugfix/closing mongodb connections (#2085)

* mongodb connection issue

* updating and pinning mongodb version

* removing pnpm-lock.yaml

* converting to a singleton

* Update pnpm lock file

* Downgrade mongodb

---------

Co-authored-by: vinodkiran <vinodkiran@usa.net>
Co-authored-by: Vinod Paidimarry <vinodkiran@outlook.in>

packages/components/package.json

@@ -39,6 +39,7 @@
         "@langchain/google-genai": "^0.0.10",
         "@langchain/groq": "^0.0.2",
         "@langchain/mistralai": "^0.0.11",
+        "@langchain/mongodb": "^0.0.1",
         "@langchain/openai": "^0.0.14",
         "@langchain/pinecone": "^0.0.3",
         "@mistralai/mistralai": "0.1.3",
@@ -81,7 +82,7 @@
         "lunary": "^0.6.16",
         "mammoth": "^1.5.1",
         "moment": "^2.29.3",
-        "mongodb": "6.2.0",
+        "mongodb": "6.3.0",
         "mysql2": "^3.9.2",
         "node-fetch": "^2.6.11",
         "node-html-markdown": "^1.3.0",