fix: update all contentful

packages/medusa-plugin-contentful/src/services/contentful.js

@@ -449,10 +449,15 @@ class ContentfulService extends BaseService {
       "options",
     ]
 
+    // Update came directly from product variant service so only act on a couple
+    // of fields. When the update comes from the product we want to ensure 
+    // references are set up correctly so we run through everything.
+    if (variant.fields) {
       const found = variant.fields.find((f) => updateFields.includes(f))
       if (!found) {
         return
       }
+    }
 
     try {
       // const ignoreIds = (await this.getIgnoreIds_("product_variant")) || []