Update registry.gitlab.com/gitlab-org/security-products/codequality to 12-5-stable

What does this MR do?

Updates registry.gitlab.com/gitlab-org/security-products/codequality image to 12-5-stable to update codeclimate from 0.85.2 to 0.85.5 in Auto DevOps context.

Prevents users from seeing the deprecation warning in the code_quality job of Auto DevOps like as follows:

WARNING: A new version (v0.85.5) is available. Upgrade instructions are available at: https://github.com/codeclimate/codeclimate#packages

Screenshots

n/a

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• [n/a] Documentation (if required)
• Code review guidelines
• [n/a] Merge request performance guidelines
• Style guides
• [n/a] Database guides
• [n/a] 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

Security

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

Closes #36213 (closed)