fix capitalization for overlayscrollbars

src/partials/_head.html

@@ -25,4 +25,5 @@
 <!-- <link rel="stylesheet" href="@@path/css/dark/adminlte-dark-addon.css" media="(prefers-color-scheme: dark)""> -->
 
 <!-- overlayScrollbars -->
-<link rel="stylesheet" href="@@path/vendor/overlayScrollbars/css/OverlayScrollbars.min.css">
+<link rel="stylesheet" href="@@path/vendor/overlayscrollbars/css/OverlayScrollbars.min.css">
+