fix(navdrawer): update the docs

Author: MPopov

projects/igniteui-angular/src/lib/core/styles/themes/schemas/dark/_navdrawer.scss

@@ -53,6 +53,7 @@ $_dark-bootstrap-navdrawer: extend(
 /// @prop {map} item-header-text-color [igx-contrast-color: ('grays', 800)] - The header's idle text color.
 /// @prop {map} item-text-color [igx-contrast-color: ('grays', 800), rgba: .8] - The item's idle text color.
 /// @prop {map} item-icon-color [igx-contrast-color: ('grays', 800), rgba: .8] - The item's icon color.
+/// @prop {map} item-active-background [igx-contrast-color: ('grays', 800), rgba: .1] - The item's active background color.
 /// @prop {map} item-active-text-color [igx-contrast-color: ('grays', 800)] - The item's active text color.
 /// @prop {map} item-active-icon-color [igx-contrast-color: ('grays', 800)] - The item's icon active color.
 /// @prop {map} item-hover-text-color [igx-contrast-color: ('grays', 800)] - The item's hover text color.

projects/igniteui-angular/src/lib/core/styles/themes/schemas/light/_navdrawer.scss

@@ -118,7 +118,7 @@ $_bootstrap-navdrawer: extend(
 /// @prop {map} item-text-color [igx-contrast-color: ('grays', 700), rgba: .8] - The item's idle text color.
 /// @prop {map} item-icon-color [igx-contrast-color: ('grays', 700), rgba: .8] - The item's icon color.
 /// @prop {map} item-active-text-color [igx-contrast-color: ('grays', 700)] - The item's active text color.
-/// @prop {map} item-active-background [igx-contrast-color: ('grays', 700), rgba: .2] - The item's active background color.
+/// @prop {map} item-active-background [igx-contrast-color: ('grays', 700), rgba: .1] - The item's active background color.
 /// @prop {map} item-active-icon-color [igx-contrast-color: ('grays', 700)] - The item's icon active color.
 /// @prop {map} item-hover-background [transparent] - The item's hover background color.
 /// @prop {map} item-hover-text-color [igx-contrast-color: ('grays', 700)] - The item's hover text color.