fix: unify the domain name

Author: shomatan

html/index.html

@@ -43,17 +43,17 @@
             <input id="spaceID" type="text" name="space" value="<?= config.space ?>" tabindex="1" class="space-id-field__id" />
             <select name="domain" tabindex="2" class="space-id-field__domain" />
               <? if (config.domain == "backlog.com") { ?>
-                <option value="backlog.com" selected>.backlog.com</option>
+                <option value="backlog.com" selected>backlog.com</option>
               <? } else  { ?>
                 <option value="backlog.com">backlog.com</option>
               <? } ?>
               <? if (config.domain == "backlog.jp") { ?>
-                <option value="backlog.jp" selected>.backlog.jp</option>
+                <option value="backlog.jp" selected>backlog.jp</option>
               <? } else  { ?>
                 <option value="backlog.jp">backlog.jp</option>
               <? } ?>
               <? if (config.domain == "backlogtool.com") { ?>
-                <option value="backlogtool.com" selected>.backlogtool.com</option>
+                <option value="backlogtool.com" selected>backlogtool.com</option>
               <? } else  { ?>
                 <option value="backlogtool.com">backlogtool.com</option>
               <? } ?>