docs(headless/popover): use new alert variant instead of caution

Author: maiieul

apps/website/src/routes/docs/headless/popover/index.mdx

@@ -634,7 +634,7 @@ Automatically places the listbox based on available space. **You must set flip t
 
 <Showcase name="auto-placement" />
 
-<Note status="caution">
+<Note status="alert">
   You cannot use **flip** and **autoPlacement** at the same time. They both manipulate the
   placement but with different strategies. Using both can result in a continuous reset
   loop as they try to override each other's work.