Update micro-frontend-support.mdx (#8515)

Author: maxkosty

src/platforms/javascript/common/configuration/micro-frontend-support.mdx

@@ -221,7 +221,8 @@ init({
       // Find the last frame with module metadata containing a DSN
       const routeTo = frames
         .filter((frame) => frame.module_metadata && frame.module_metadata.dsn)
-        .map((v) => v.module_metadata);
+        .map((v) => v.module_metadata)
+        .slice(-1); // using top frame only - you may want to customize this according to your needs
 
       if (routeTo.length) {
         event.extra = {