Fix missing source strings and inconsistent lead text style in admin UI (#16052)

app/views/admin/follow_recommendations/show.html.haml

@@ -4,8 +4,7 @@
 - content_for :header_tags do
   = javascript_pack_tag 'admin', async: true, crossorigin: 'anonymous'
 
-.simple_form
-  %p.hint= t('admin.follow_recommendations.description_html')
+%p= t('admin.follow_recommendations.description_html')
 
 %hr.spacer/
 

app/views/admin/rules/index.html.haml

@@ -1,8 +1,9 @@
 - content_for :page_title do
   = t('admin.rules.title')
 
-.simple_form
-  %p.hint= t('admin.rules.description')
+%p= t('admin.rules.description_html')
+
+%hr.spacer/
 
 - if can? :create, :rule
   = simple_form_for @rule, url: admin_rules_path do |f|

app/views/user_mailer/webauthn_enabled.text.erb

@@ -1,7 +1,7 @@
-<%= t 'devise.mailer.webauthn_credentia.added.title' %>
+<%= t 'devise.mailer.webauthn_credential.added.title' %>
 
 ===
 
-<%= t 'devise.mailer.webauthn_credentia.added.explanation' %>
+<%= t 'devise.mailer.webauthn_credential.added.explanation' %>
 
 => <%= edit_user_registration_url %>