Updates to index.md for latest release (MystenLabs#4505)

doc/src/learn/index.md

@@ -1,5 +1,5 @@
 ---
-title: Learning Sui
+title: Learn About Sui
 ---
 
 *Sui: pronounced "sweet" without the "T" - with Transactions (loads of them), things are SWEET indeed. :-)*
@@ -12,13 +12,14 @@ For a deep dive into Sui technology, see the [Sui Smart Contracts Platform](http
 
 ## See what's new
 
+Check for the latest release of Sui on the [Releases](https://github.com/MystenLabs/sui/releases) page.
+
 ### Doc updates
 
-The following list includes the recent updates to Sui and the documentation:
+We made the following updates to Sui documentation:
 
 * [Bullshark](https://arxiv.org/abs/2201.05677) replaced Tusk as the default consensus component of the [Narwhal](https://github.com/MystenLabs/narwhal)-based [Sui consensus engine](../learn/architecture/consensus.md) for reduced latency and support for fairness with slower validators. Note, Tusk may still be used.
 * You must now specify the key scheme type as an argument (`ed25519` or `secp256k1`) when running either the `sui keytool generate` or `sui client new-address` commands, as shown in [adding accounts to the client](../build/cli-client.md#adding-accounts-to-the-client).
-* [Sui version 0.8.0](https://github.com/MystenLabs/sui/releases/tag/devnet-0.8.0) is now live in Devnet with numerous fixes and enhancements, including new designs for [Sui Explorer](https://explorer.devnet.sui.io/) and [event query support](https://github.com/MystenLabs/sui/blob/main/crates/sui-json-rpc/src/event_api.rs#L122-L210) in fullnode.
 * Follow the [Cryptography (math)](https://github.com/MystenLabs/sui/tree/main/sui_programmability/examples/math) example for a simple contract that hashes a piece of data using keccak256, recovers a [Secp256k1](https://crates.io/crates/secp256k1/) signature to its public key, and verifies a Secp256k1 signature, producing an event with the results.
 * Sui now supports [shared objects](../build/objects.md#shared) that anyone can read or write to. For an example of creating and accessing a shared object, see [Shared Object](https://examples.sui.io/basics/shared-object.html#shared-object) on https://examples.sui.io/.
 * Interact with the Sui network using our new [Rust SDK](../build/rust-sdk.md), a collection of Rust language [JSON-RPC wrapper and crypto utilities](https://github.com/MystenLabs/sui/tree/main/crates/sui-sdk).
@@ -28,8 +29,6 @@ See the Sui `doc/src` [history](https://github.com/MystenLabs/sui/commits/main/d
 
 ### Code changes
 
-Learn about the latest releases in the [#release-notes](https://discord.com/channels/916379725201563759/974444055259910174) channel on Discord.
-
 For a complete view of all changes in the Sui `devnet` branch, see:
 https://github.com/MystenLabs/sui/commits/devnet