docs: fix missing quotation mark in marketplace vendor tutorial curl request (#12315)

www/apps/resources/app/recipes/marketplace/examples/vendors/page.mdx

@@ -885,7 +885,7 @@ You can now retrieve an authenticated token of the vendor admin. To do that, sen
 curl -X POST 'http://localhost:9000/auth/vendor/emailpass' \
 -H 'Content-Type: application/json' \
 --data-raw '{
-    "email": "vendor@example.com,
+    "email": "vendor@example.com",
     "password": "supersecret"
 }'
 ```