Fix highlight color in the light theme (#444)

templates/base.html

@@ -14,7 +14,7 @@
         <script src="{% static "js/htmx.min.js" %}"></script>
         <script src="{% static "js/takahe.min.js" %}"></script>
         <style>
-            body {
+            body, body.light-theme {
                 --color-highlight: {{ config.highlight_color }};
                 --color-text-link: {{ config.highlight_color }};
             }