📝(react) add missing design tokens on Select's documentation

Design tokens documented in the Select docs should match the available tokens.
This modification offer an exhaustive and complete list of the design
tokens available to customize the select component.

packages/react/src/components/Forms/Select/index.mdx

@@ -131,12 +131,15 @@ Here are the custom design tokens defined by the select.
 | border-radius     	| Border radius of the select      	|
 | border-radius--hover   	| Border radius of the select on mouse hover    	|
 | border-radius--focus   	| Border radius of the select when focused    	|
+| border-style              | Border style of the select      	|
+| border-width              | Border width of the select      	|
 | color   	| Value color  	|
 | font-size        	| Value font size        	|
 | height | Height of the combo box |
 | item-background-color--hover | Background color of the item on mouse hover    	|
 | item-background-color--selected | Background color of the selected item    	|
 | item-color | Color of the item    	|
+| item-color--disabled | Color of the disabled item    	|
 | item-font-size | Font size of the item    	|
 | menu-background-color | Background color of the menu    	|
 | label-color--focus | Label color when focused    	|