[Docs]: Add Kinsta to the list of deployment providers (#4445)

We're fans of the LangChain framework thus we wanted to make sure we
provide an easy way for our customers to be able to utilize this
framework for their LLM-powered applications at our platform.

docs/deployments.md

@@ -29,6 +29,10 @@ It implements a Question Answering app and contains instructions for deploying t
 
 A minimal example on how to run LangChain on Vercel using Flask.
 
+## [Kinsta](https://github.com/kinsta/hello-world-langchain)
+
+A minimal example on how to deploy LangChain to [Kinsta](https://kinsta.com) using Flask.
+
 ## [Fly.io](https://github.com/fly-apps/hello-fly-langchain)
 
 A minimal example of how to deploy LangChain to [Fly.io](https://fly.io/) using Flask.