Merge pull request #22 from fastapi-startkit/fix/dark-mode-toggle-icon

fix: dark mode toggle icon visibility and outline-variant color

Author: bedus-creation

.vitepress/theme/custom.css

@@ -166,7 +166,7 @@
     --color-on-primary: #022c22;
 
     --color-outline: #475569;
-    --color-outline-variant: #1e293b;
+    --color-outline-variant: #64748b;
 
     --color-inverse-surface: #e2e8f0;
     --color-inverse-on-surface: #1e293b;