Update the Behat tests: Redmine 6.0.5 and 5.1.8 released

[github-actions]

Maintenance releases 6.0.5 and 5.1.8 are now available to Download, bringing a total of 32 bug fixes (Changelog).

Version 6.0.5 also continues the transition to modern SVG icons powered by Tabler, resolves an issue with plugin activity SVG icon paths when multiple plugins are loaded (#42509) and improves the support for RTL languages (#42575, #42465).

Thanks everyone for their contributions.

https://www.redmine.org/news/153