Rename profile navigation tab 'Personal Access Tokes' to 'Access Tokens'

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/views/layouts/nav/_profile.html.haml

@@ -20,7 +20,7 @@
     = nav_link(controller: :personal_access_tokens) do
       = link_to profile_personal_access_tokens_path, title: 'Personal Access Tokens' do
         %span
-          Personal Access Tokens
+          Access Tokens
     = nav_link(controller: :emails) do
       = link_to profile_emails_path, title: 'Emails' do
         %span