Fix 'Badly anchored regular expression' code scanning alert

[stefannibrasil]

https://github.com/faker-ruby/faker/security/code-scanning/4
https://github.com/faker-ruby/faker/security/code-scanning/2
https://github.com/faker-ruby/faker/security/code-scanning/3

[stefannibrasil]

My bad, this has been fixed in #3181

The code scanning workflow is scheduled to run every week and the issues were still open, but after running the workflow manually, these issues have been closed.