feat(web/atward): make checkbox label clickable

Change-Id: I147f1f2eee4f6b8f7ecea1b341d192477182d61c
Reviewed-on: https://cl.tvl.fyi/c/depot/+/3116
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>

web/atward/indexHtml/default.nix

@@ -43,8 +43,9 @@ depot.web.tvl.template {
     <form class="cheddar-callout cheddar-todo">
       <input type="checkbox"
              id="cs-setting"
-             onchange="saveSetting(this, 'cs');"
-             > Use Sourcegraph instead of cgit</input>
+             name="cs-setting"
+             onchange="saveSetting(this, 'cs');">
+      <label for="cs-setting">Use Sourcegraph instead of cgit</label>
     </form>
 
     <noscript>