bugfix:The Mintlify navbar (logo + search bar with ⌘K) scrolls away w… (#2445)

* bugfix:The Mintlify navbar (logo + search bar with ⌘K) scrolls away when scrolling down the documentation, so it disappears from view.

* fix(docs): keep navbar visible on scroll (#2445) (thanks @chenyuan99)

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Co-authored-by: vignesh07 <vigneshnatarajan92@gmail.com>

docs/assets/terminal.css

@@ -115,6 +115,9 @@ body::after {
 }
 
 .shell {
+  position: sticky;
+  top: 0;
+  z-index: 100;
   padding: 22px 16px 10px;
 }