[Glitch] Change icons of features on admin dashboard to remove bias

Port SCSS changes from e117964325 to glitch-soc

app/javascript/flavours/glitch/styles/admin.scss

@@ -220,6 +220,11 @@ $content-width: 840px;
       color: $error-value-color;
       font-weight: 500;
     }
+
+    .neutral-hint {
+      color: $dark-text-color;
+      font-weight: 500;
+    }
   }
 
   @media screen and (max-width: $no-columns-breakpoint) {