feat: add link to GitHub changelog

docs/concepts/01-what-is-sablier.mdx

@@ -21,15 +21,15 @@ from one account to another, in realtime.
 
 ### Release history
 
+See the full changelog on [GitHub](https://github.com/sablier-labs/v2-core/blob/main/CHANGELOG.md).
+
 - **Sablier V2.2**: The latest version of **The Sablier Protocol**.
-- **Sablier V2.1**: Released in December 2023, it was a minor upgrade over the second version.
+- **Sablier V2.1**: Minor update released in December 2023.
 - **Sablier V2.0**: The second big version of **The Sablier Protocol**, released in July 2023.
-- **Sablier V1.1**: Minor upgrade for V1, released in July 2021.
+- **Sablier V1.1**: Minor update for V1, released in July 2021.
 - **Sablier V1.0**: The first big version of **The Sablier Protocol**, originally released in 2019.
 
 :::tip
 
 If you have any questions along the way, please join the #dev channel in our <Link href={links.discord}>Discord
-server</Link>. Our team and members of the community are looking forward to help you.‌
-
-:::
+server</Link>. Our team and members of the community are looking forward to help you.‌ :::