ci: Bump the charts version used for Review Apps to 5.5.0
What does this MR do and why?
https://gitlab.com/gitlab-org/charts/gitlab/-/blob/master/CHANGELOG.md
MR acceptance checklist
This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.
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I have evaluated the MR acceptance checklist for this MR.
Edited by Rémy Coutable