Use link color from OS2.eu

Author: turegjorup

_sass/color_schemes/os2display.scss

@@ -1,6 +1,6 @@
 // @see https://github.com/just-the-docs/just-the-docs/blob/main/_sass/support/_variables.scss
 
-$link-color: $os2-green-000;
+$link-color: $os2-link-000;
 $btn-primary-color: $os2-green-000;
 $body-font-family: "Montserrat", "Odoo Unicode Support Noto", sans-serif;
 $body-text-color: $os2-text-black-000;