fix: upgrade http:// to https:// in README (#2182)

Co-authored-by: Amin Ya <aminyahyaabadi74@gmail.com>

Author: MOHAMMED HANAN M T P

README.md

@@ -87,7 +87,7 @@ If you find/create a package that you think can be useful when used in combinati
 
 ## How it works
 
-Hydrogen implements the [messaging protocol](http://jupyter-client.readthedocs.io/en/latest/messaging.html) for [Jupyter](https://jupyter.org/). Jupyter (formerly IPython) uses ZeroMQ to connect a client (like Hydrogen) to a running kernel (like IJulia or iTorch). The client sends code to be executed to the kernel, which runs it and sends back results.
+Hydrogen implements the [messaging protocol](https://jupyter-client.readthedocs.io/en/latest/messaging.html) for [Jupyter](https://jupyter.org/). Jupyter (formerly IPython) uses ZeroMQ to connect a client (like Hydrogen) to a running kernel (like IJulia or iTorch). The client sends code to be executed to the kernel, which runs it and sends back results.
 
 ## Why "Hydrogen"?