feat: update email templates to use user's name instead of email

app/views/devise/mailer/password_change.html.erb

@@ -1,3 +1,3 @@
-<p>Hello <%= @resource.email %>!</p>
+<p>Hello <%= @resource.name  %>!</p>
 
 <p>We're contacting you to notify you that your password has been changed.</p>

app/views/devise/mailer/reset_password_instructions.html.erb

@@ -1,4 +1,4 @@
-<p>Hello <%= @resource.email %>!</p>
+<p>Hello <%= @resource.name %>!</p>
 
 <p>Someone has requested a link to change your password. You can do this through the link below.</p>
 

app/views/devise/mailer/unlock_instructions.html.erb

@@ -1,4 +1,4 @@
-<p>Hello <%= @resource.email %>!</p>
+<p>Hello <%= @resource.name %>!</p>
 
 <p>Your account has been locked due to an excessive number of unsuccessful sign in attempts.</p>