Fix punycode being rendered instead of unicode in some places (#13030)

app/views/accounts/_og.html.haml

@@ -10,4 +10,4 @@
 = opengraph 'og:image:width', '120'
 = opengraph 'og:image:height', '120'
 = opengraph 'twitter:card', 'summary'
-= opengraph 'profile:username', account.local_username_and_domain
+= opengraph 'profile:username', acct(account)[1..-1]

app/views/accounts/show.html.haml

@@ -1,5 +1,5 @@
 - content_for :page_title do
-  = "#{display_name(@account)} (@#{@account.local_username_and_domain})"
+  = "#{display_name(@account)} (#{acct(@account)})"
 
 - content_for :header_tags do
   - if @account.user&.setting_noindex