Update matomo Docker tag to v4.16.0

This MR contains the following updates:

Package	Type	Update	Change
matomo	ironbank-docker	minor	4.15.1-fpm -> 4.16.0-fpm
matomo		minor	4.15.1 -> 4.16.0
matomo	stage	minor	4.15.1-fpm -> 4.16.0-fpm

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