update corresponding paragraph as well

Author: NicoHinderling

develop-docs/backend/api/design.mdx

@@ -119,7 +119,7 @@ POST /resources/{id}
 
 ### Batch Operations
 
-Resources can get complicated when you need to expose batch operations vs single resource operations. For batch operations it is preferred to expose them as a `POST` request on the collection when possible.
+Resources can get complicated when you need to expose batch operations vs single resource operations. For batch operations it is preferred to expose them as a `PUT` request on the collection when possible.
 
 Let's say for example we have an endpoint that mutates an issue: