Update file secure_coding_guidelines.md
What does this MR do and why?
Fixes a broken link in the Doc that is supposed to point to the GitLab Cryptography Standard
MR acceptance checklist
Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.
Not required as a Docs link fix.
Screenshots or screen recordings
Screenshots are required for UI changes, and strongly recommended for all other merge requests.
Simple web link fix, not required.
How to set up and validate locally
Numbered steps to set up and validate the change are strongly suggested.
On the page https://docs.gitlab.com/ee/development/secure_coding_guidelines.html#examples-3
(here) the link points to https://handbook.gitlab.com/handbook/security/cryptographic-standard.html#algorithmic-standards
instead of https://handbook.gitlab.com/handbook/security/cryptographic-standard/#algorithmic-standards
(here)