Set cookie path to / to stop it bloating the cookie list

src/Base.astro

···
     <title>{title} | vielle.dev</title>
     <script>
       // sets the timezone offset
-      document.cookie = `timezone=${new Date().toString()}`;
+      document.cookie = `timezone=${new Date().toString()};path=/`;
     </script>
     <!-- default styles (rem, *) -->
     <style is:global>

src/pages/blog/[id].astro

···
 
   const updateColourScheme = () => {
     root.style.colorScheme = lightMode ? "light" : "dark";
-    document.cookie = `colour-mode=${root.style.colorScheme}`;
+    document.cookie = `colour-mode=${root.style.colorScheme};path=/`;
 
     modeToggled[lightMode ? "light" : "dark"].forEach((el) => {
       if (!(el instanceof SVGElement || el instanceof HTMLElement)) return;