chore(deps): update reg.undercloud.cri.epita.fr/docker/rocketchat/rocket.chat docker tag to v6 - autoclosed

This MR contains the following updates:

Package	Type	Update	Change
reg.undercloud.cri.epita.fr/docker/rocketchat/rocket.chat	Kustomization	major	5.0.1 -> 6.4.2

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