Update percona/percona-backup-mongodb Docker tag to v2.4.1

This MR contains the following updates:

Package	Type	Update	Change
percona/percona-backup-mongodb		patch	2.4.0 -> 2.4.1
percona/percona-backup-mongodb	ironbank-docker	patch	2.4.0 -> 2.4.1
percona/percona-backup-mongodb	stage	patch	2.4.0 -> 2.4.1

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