build(deps): bump holidays from 0.98 to 0.99 in /dev-tools (#16334)

Bumps [holidays](https://github.com/vacanza/holidays) from 0.98 to 0.99.
- [Release notes](https://github.com/vacanza/holidays/releases)
- [Changelog](https://github.com/vacanza/holidays/blob/dev/CHANGES.md)
- [Commits](vacanza/holidays@v0.98...v0.99)

---
updated-dependencies:
- dependency-name: holidays
  dependency-version: '0.99'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

dev-tools/scripts/requirements.txt

@@ -5,7 +5,7 @@ PyYAML==6.0.3
 # types
 types-PyYAML==6.0.12.20260518
 # international holidays in releaseWizard
-holidays==0.98
+holidays==0.99
 # calendar processing in releaseWizard
 ics==0.7.3
 # terminal processing in releaseWizard