Fix thevoid theme on light mode devices

Signed-off-by: Danila Fedorin <danila.fedorin@gmail.com>

assets/scss/thevoid.scss

@@ -2,6 +2,7 @@
 
 body {
   background-color: #1c1e26;
+  --text-color: white;
   font-family: $font-code;
 }