build(deps): bump contentful-management from 5.26.2 to 5.26.3

Bumps [contentful-management](https://github.com/contentful/contentful-management.js) from 5.26.2 to 5.26.3.
- [Release notes](https://github.com/contentful/contentful-management.js/releases)
- [Commits](contentful/contentful-management.js@v5.26.2...v5.26.3)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>