Fix typo and make navbar title consistent

app/views/groups/ldap_group_links/index.html.haml

-- page_title 'LDAP Syncrhonizations'
+- page_title 'LDAP Synchronization'
 %h3.page-title LDAP synchronizations
 = render 'ldap_group_links/form', group: @group
 = render 'ldap_group_links/ldap_group_links', group: @group

ee/app/views/groups/ee/_settings_nav.html.haml

@@ -2,7 +2,7 @@
   = nav_link(path: 'ldap_group_links#index') do
     = link_to group_ldap_group_links_path(@group), title: 'LDAP Group' do
       %span
-        LDAP Group
+        LDAP Synchronization
 
 - if @group.feature_available?(:group_webhooks) || show_promotions?
   = nav_link(path: 'hooks#index') do