📄 docs: add @latest to svelte-add command to ensure the latest version is always used (npm has betrayed me)

Author: babichjacob

README.md

@@ -7,7 +7,7 @@ This is an adder for `svelte-add`; you should [read its `README`](https://github
 This adder's codename is `tailwindcss`, and can be used like so:
 
 ```sh
-npx svelte-add tailwindcss
+npx svelte-add@latest tailwindcss
 ```
 
 ### 🏞 Supported environments