Publish missing more_info_phone_number to content_store.

it'll be a better test if these is something like:
```ruby
more_info_phone_number { "phone number: #{generate(:govspeak)}" }
more_info_email_address { "email address: #{generate(:govspeak)}" }
```
and assertions:
```ruby
expect(details[:more_info_email_address]).to include("<li> email address: ")
expect(details[: more_info_phone_number]).to include("<li> phone number: ")
```

right now the test will pass even if a copy-paste error leads to:
```ruby
more_info_phone_number: govspeak(contact.more_info_email_address)
```