Fix fetch() location for copy bookmarklet

static/help.html

@@ -208,10 +208,10 @@ a {
                         <sl-tag pill variant="primary">
                             <a href="javascript:(async function() {
                                 try {
-                                    const response = await fetch('{{ .writeHost }}', {
+                                    const response = await fetch('https://{{ .writeHost }}/', {
                                         method: 'POST',
                                         headers: {
-                                        'Content-Type': 'application/json'
+                                            'Content-Type': 'application/json'
                                         },
                                         body: JSON.stringify({ long: location.href }),
                                     });