test: add class to uniquely id item dashboard (#30487)

diff --git a/erpnext/stock/dashboard/item_dashboard.html b/erpnext/stock/dashboard/item_dashboard.html
index 99698ba..b7a786e 100644
--- a/erpnext/stock/dashboard/item_dashboard.html
+++ b/erpnext/stock/dashboard/item_dashboard.html
@@ -1,4 +1,4 @@
-<div>
+<div class="stock-levels">
 	<div class="result">
 	</div>
 	<div class="more hidden" style="padding: 15px;">