docs: add section on updating medusa

www/apps/book/app/learn/installation/page.mdx

@@ -105,6 +105,18 @@ You can then use the user's credentials to log into the Medusa Admin application
 
 ---
 
+## Update Medusa Application
+
+New Medusa updates are posted in the [GitHub repository's releases](https://github.com/medusajs/medusa/releases). You can also find the latest version at the top navigation of the documentation, and you can click on it to view the release notes of the latest version.
+
+To update your Medusa application, bump the version of all `@medusajs/*` dependencies in your `package.json`. Then, re-install dependencies:
+
+```bash npm2yarn
+npm run install
+```
+
+---
+
 ## Project Files
 
 Your Medusa application's project will have the following files and directories:

www/apps/book/generated/edit-dates.mjs

@@ -107,6 +107,6 @@ export const generatedEditDates = {
   "app/learn/build/page.mdx": "2024-12-09T11:05:17.383Z",
   "app/learn/deployment/general/page.mdx": "2024-11-25T14:33:50.439Z",
   "app/learn/fundamentals/workflows/multiple-step-usage/page.mdx": "2024-11-25T16:19:32.169Z",
-  "app/learn/installation/page.mdx": "2024-12-09T11:22:27.919Z",
+  "app/learn/installation/page.mdx": "2024-12-12T15:22:29.182Z",
   "app/learn/fundamentals/data-models/check-constraints/page.mdx": "2024-12-06T14:34:50.384Z"
 }