chore: Update long-term-support doc (#919)

Author: LekoArts

docs/upgrade-guides/core-2/overview.mdx

@@ -7,7 +7,7 @@ description: "Learn how to upgrade to the latest version of Clerk's SDKs"
 
 # Upgrading to Clerk Core 2
 
-In Febrary 2024, [we updated](https://clerk.com/changelog/2024-01-16) Clerk's SDKs to include Core 2. This new core includes:
+In April 2024, we updated Clerk's SDKs to include Core 2. This new core includes:
 
 - 💅 Redesigned and improved component UIs.
 - 🔪 The 401 & "flash of white page" that was visible sometimes when syncing auth state was eliminated.
@@ -19,14 +19,14 @@ In Febrary 2024, [we updated](https://clerk.com/changelog/2024-01-16) Clerk's SD
 Core 2 brings both UI changes and breaking code changes, so each SDK has been updated to a new major version.
 We expect upgrades to take less than 30 minutes, and are providing a CLI tool to assist with the process. Please select your SDK below to get started:
 
-- [Next.js](/nextjs)
-- [Remix](/remix)
-- [Expo](/expo)
-- [Node](/node)
-- [Fastify](/fastify)
-- [React](/react)
-- [Backend](/backend)
-- [JS](/js)
-- [Chrome Extension](/chrome-extension)
-
-Note that the `Gastsby`, `Go`, and `Ruby` SDKs do not yet have a core 2 release ready - if you are using any of these SDKs there is nothing actionable right now.
+- [Next.js](/docs/upgrade-guides/core-2/nextjs)
+- [Remix](/docs/upgrade-guides/core-2/remix)
+- [Expo](/docs/upgrade-guides/core-2/expo)
+- [Node](/docs/upgrade-guides/core-2/node)
+- [Fastify](/docs/upgrade-guides/core-2/fastify)
+- [React](/docs/upgrade-guides/core-2/react)
+- [Backend](/docs/upgrade-guides/core-2/backend)
+- [JS](/docs/upgrade-guides/core-2/javascript)
+- [Chrome Extension](/docs/upgrade-guides/core-2/chrome-extension)
+
+Note that the `Gatsby`, `Go`, and `Ruby` SDKs do not yet have a Core 2 release ready - if you are using any of these SDKs there is nothing actionable right now.

docs/upgrade-guides/long-term-support.mdx

@@ -17,8 +17,8 @@ After the LTS period ends, there will be no further changes to the code for that
 
 | Version | Status                        | As Of            | Until            |
 | ------- | ----------------------------- | ---------------- | ---------------- |
-| Core 2       | Active      | February 29, 2024 | TBD          |
-| Core 1       | Long term support | February 29, 2024 | Q1 2025          |
+| Core 2       | Active      | April 19, 2024 | TBD          |
+| Core 1       | Long term support | April 19, 2024 | Q1 2025          |
 | Legacy (v3)       | Unsupported                   | - | - |
 
 ## Terminology