Fix removed navbar height variable in bootstrap 5

Author: francoispluchino

scss/_variables-bootstrap.scss

@@ -22,8 +22,6 @@ $headings-font-family: null !default;
 
 $zindex-fixed: 1030 !default;
 
-$navbar-height: 56px !default;
-
 $navbar-dark-color: rgba($white, .55) !default;
 
 $grid-gutter-width: 1.5rem !default;

scss/_variables.scss

@@ -49,7 +49,7 @@ $sidebar-mini-width:                 round($sidebar-width / 3) !default;
 $sidebar-clickable-swipe-bg:         fade($primary, 23%) !default;
 $sidebar-obfuscator-bg:              rgba(0, 0, 0, 0.5) !default;
 $sidebar-obfuscator-duration:        '0.3s' !default;
-$sidebar-navbar-height:              $navbar-height !default;
+$sidebar-navbar-height:              56px !default;
 
 $sidebar-default-font-size:          $font-size-base !default;
 $sidebar-default-color:              $gray-900 !default;