chore: 🤖 rename application_credentials_sources_ids to brokered (#1255)

addons/api/addon/serializers/target.js

@@ -54,7 +54,7 @@ export default class TargetSerializer extends ApplicationSerializer {
   serializeWithCredentialSources(snapshot, credentialSourceIDs) {
     return {
       version: snapshot.attr('version'),
-      application_credential_source_ids: credentialSourceIDs,
+      brokered_credential_source_ids: credentialSourceIDs,
     };
   }
 }