Replace "Sign in text" with "Sign-in text"

Summary

The following text is not correct, when navigating to Admin Area > Settings > General and expanding the "Sign-in restrictions" section:

"Sign in text"

should be

"Sign-in text"

(And for similar reasons, "After sign out path" should be "After sign-out path")

Normally I'd "just change the text". However, based on app/views/admin/application_settings/_signin.html.haml, it's based on the sign_in_text variable, and I don't know where / how words are assigned to that variable.

Steps to reproduce

Example Project

What is the current bug behavior?

What is the expected correct behavior?

Relevant logs and/or screenshots

Output of checks

Results of GitLab environment info

Expand for output related to GitLab environment info

(For installations with omnibus-gitlab package run and paste the output of:
`sudo gitlab-rake gitlab:env:info`)

(For installations from source run and paste the output of:
`sudo -u git -H bundle exec rake gitlab:env:info RAILS_ENV=production`)

Results of GitLab application Check

Expand for output related to the GitLab application check

(For installations with omnibus-gitlab package run and paste the output of:
sudo gitlab-rake gitlab:check SANITIZE=true)
(For installations from source run and paste the output of:
sudo -u git -H bundle exec rake gitlab:check RAILS_ENV=production SANITIZE=true)
(we will only investigate if the tests are passing)

Possible fixes