chore: Update Vale and Markdownlint rules from GitLab project

See merge request !2927



Merged-by: Michael Angelo Rivera <arivera@gitlab.com>
Approved-by: Amy Qualls <aqualls@gitlab.com>
Approved-by: Michael Angelo Rivera <arivera@gitlab.com>
Co-authored-by: Evan Read <eread@gitlab.com>

fix: resolve LS exported types error

Closes #2142

See merge request !2931



Merged-by: Tristan Read <tread@gitlab.com>
Approved-by: Tristan Read <tread@gitlab.com>
Co-authored-by: Elwyn Benson <ebenson@gitlab.com>

## **pre-release**  [6.49.10](v6.49.9...v6.49.10) (2025-10-20)

### Bug Fixes

* resolve LS exported types error ([e948a99b](e948a99b))