Fix upload code example

Co-authored-by: Gustav Hansen <[email protected]>

Author: pwizla

docs/developer-docs/latest/plugins/upload.md

@@ -149,7 +149,7 @@ import fetch, { blobFrom } from 'node-fetch';
 const file = await blobFrom('./1.png', 'image/png');
 const form = new FormData();
 
-form.append('files', file, "iamge.png");
+form.append('files', file, "1.png");
 
 const response = await fetch('http://localhost:1337/api/upload', {
   method: 'post',