Update dependency matomo to v4.12.3

This MR contains the following updates:

Package	Type	Update	Change
matomo	ironbank-docker	patch	4.12.2-fpm -> 4.12.3-fpm
matomo		patch	4.12.2 -> 4.12.3
matomo	stage	patch	4.12.2-fpm -> 4.12.3-fpm

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