fixes a typo

Author: capaj

docs/getting-started/setup.mdx

@@ -11,7 +11,7 @@ Firstly, add `decapi` to your project
 yarn add decapi graphql reflect-metadata
 ```
 
-**Important!** To work with `typescript`, you'll need `reflect-medatada` so `decapi` can infer types from your code.
+**Important!** To work with `typescript`, you'll need `reflect-metadata` so `decapi` can infer types from your code.
 
 Add `import "reflect-metadata";` somewhere in bootstrap (before any `decapi` decorator is used) of your app eg `app/index.ts`.