chore(deps): update mattermost support dependencies #1136

Job	Run time
check-flavor	6s
validate (install, unicorn) / run	3s
validate (install, upstream) / run	7s
validate (install, registry1) / run	19s
validate (upgrade, registry1) / run	6s
validate (upgrade, unicorn) / run	4s
validate (upgrade, upstream) / run	4s
	49s

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