Add missing label for darkmode toggle

Author: meldra

themes/CodeMeta-Pyramids/layouts/partials/nav.html

@@ -22,7 +22,7 @@
           {{ end }}
           <li>
 			<div class="form-check dark-light-toggler">
-				<input class="form-check-input" type="checkbox" id="darkModeSwitch">
+				<input class="form-check-input" type="checkbox" id="darkModeSwitch" aria-label="Switch between light and dark mode">
 				<label class="form-check-label" for="darkModeSwitch">
 					<i role="presentation" class='bi bi-sun-fill d-none' id='light-mode-bi' title="Light mode"></i>
 					<i role="presentation" class='bi bi-moon-stars-fill' id='dark-mode-bi' title="Dark mode"></i>