[EDIT] Update the list of Infrastructure Providers (index.mdx) (#236)

* Update the list of Infrastructure Providers (index.mdx)

Adding NOWNodes as an Osmosis node provider. Please let me know if any changes should be applied from our side to this PR.

* [EDIT] Update the PR for NOWNodes listing (index.mdx)

Corrected the spelling

docs/overview/endpoints/index.mdx

@@ -102,5 +102,7 @@ The following is a list of explorers available.
 
 - [DataHub](https://datahub.figment.io) : `https://datahub.figment.io`
 
+- [NOWNodes](https://nownodes.io/osmosis-osmo) is a Web3 development tool that provides shared and dedicated access to Osmosis RPC Full Node and Osmosis Tendermint endpoint on free and paid plans. The Osmosis Node API endpoint: `https://osmo.nownodes.io`
+
 - [OnFinality](https://onfinality.io/) is a blockchain infrastructure platform that saves Web3 builders time and makes their lives easier. OnFinality delivers scalable API endpoints for the biggest blockchain networks and empowers developers to automatically test, deploy, scale and monitor their own blockchain nodes in minutes. OnFinality offers free and premium (Pay-as-you-go or subsription-based) API [services for Osmosis](https://onfinality.io/networks/osmosis). Public RPC Endpoint for Osmosis: `https://osmosis.api.onfinality.io/public`