Update upgrade instructions in v4.1 blog post

Author: reinink

src/blog/tailwindcss-v4-1/index.mdx

@@ -58,10 +58,25 @@ That's all the cool stuff, but there's a few other little things hiding in the [
 
 Upgrade your projects by installing the latest version of `tailwindcss` from npm:
 
+<CodeExampleStack>
+
+```sh
+# [!code filename:Using the Tailwind CLI]
+npm install tailwindcss@latest @tailwindcss/cli@latest
+```
+
 ```sh
-npm install tailwindcss@latest
+# [!code filename:Using Vite]
+npm install tailwindcss@latest @tailwindcss/vite@latest
 ```
 
+```sh
+# [!code filename:Using PostCSS]
+npm install tailwindcss@latest @tailwindcss/postcss@latest
+```
+
+</CodeExampleStack>
+
 ---
 
 ## New `text-shadow-*` utilities
@@ -872,8 +887,23 @@ The new `user-valid` and `user-invalid` variants try to solve this problem, by o
 
 So that's it, that's Tailwind CSS v4.1! Update to the latest version using npm and start playing with it today:
 
+<CodeExampleStack>
+
+```sh
+# [!code filename:Using the Tailwind CLI]
+npm install tailwindcss@latest @tailwindcss/cli@latest
+```
+
 ```sh
-npm install tailwindcss@latest
+# [!code filename:Using Vite]
+npm install tailwindcss@latest @tailwindcss/vite@latest
 ```
 
+```sh
+# [!code filename:Using PostCSS]
+npm install tailwindcss@latest @tailwindcss/postcss@latest
+```
+
+</CodeExampleStack>
+
 Looking forward to seeing what you build with the new features!