darkened the filled green in heatmap when in dark theme

Author: aguero-tech

src/custom-theme.scss

@@ -154,7 +154,7 @@ body.dark-theme {
 }
 
 body.dark-theme {
-  --heatmap-filled: #4caf50;
+  --heatmap-filled: #007700;
   --heatmap-disabled: #666666;
   --heatmap-cursor: green;
   --heatmap-background: #bbbbbb;