[Snyk] Upgrade @umbraco-cms/backoffice from 15.3.1 to 15.4.0#92

jcdcdev merged 1 commit into

dev/v15jcdcdev/jcdcdev.Umbraco.ReadingTime:dev/v15from

snyk-upgrade-199e7ea2cb64bbdec51bf5b9bb6a4e0djcdcdev/jcdcdev.Umbraco.ReadingTime:snyk-upgrade-199e7ea2cb64bbdec51bf5b9bb6a4e0dCopy head branch name to clipboard