Update serializeAttributes documentation to cover multiple attributes. (#3825)

Author: onurtemizkan

src/platforms/javascript/common/configuration/integrations/default.mdx

@@ -53,11 +53,11 @@ Available options:
 
   // Log all click and keypress events
   // - When an object with `serializeAttribute` key is provided,
-  //   Breadcrumbs integration will look for that attribute in DOM elements,
+  //   Breadcrumbs integration will look for given attribute(s) in DOM elements,
   //   while generating the breadcrumb trails.
   //   Matched elements will be followed by their custom attributes,
   //   instead of their `id`s or `class` names.
-  dom: boolean | { serializeAttribute: string };
+  dom: boolean | { serializeAttribute: string | string[] };
 
   // Log HTTP requests done with the Fetch API
   fetch: boolean;