build: Bump laravel/telescope from 5.2.5 to 5.2.6

Bumps [laravel/telescope](https://github.com/laravel/telescope) from 5.2.5 to 5.2.6.
- [Release notes](https://github.com/laravel/telescope/releases)
- [Changelog](https://github.com/laravel/telescope/blob/5.x/CHANGELOG.md)
- [Commits](laravel/telescope@v5.2.5...v5.2.6)

---
updated-dependencies:
- dependency-name: laravel/telescope
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>