Update validates_hostname and i18n gem patch levels

What does this MR do?

The list of valid TLDs has been expanded significantly since validates_hostname was last updated, see e.g. #208860 (closed) for a user complaint.

See

• https://github.com/KimNorgaard/validates_hostname/compare/a2d823fcc462f4259d6f66e88723c0fbbba1b492...v1.0.10 for changes in validates_hostname
• https://github.com/ruby-i18n/i18n/compare/v1.8.2...v1.8.3 for changes in i18n

Screenshots

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• [-] Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content

Availability and Testing

• [-] Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• [-] Tested in all supported browsers
• [-] Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• [-] Label as security and @ mention @gitlab-com/gl-security/appsec
• [-] The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• [-] Security reports checked/validated by a reviewer from the AppSec team