Update dependency software.xdev:chartjs-java-model to v2.9.0#72

xdev-renovate wants to merge 1 commit intodevelopxdev-software/vaadin-chartjs-wrapper:developfrom

renovate/software.xdev-chartjs-java-model-2.xxdev-software/vaadin-chartjs-wrapper:renovate/software.xdev-chartjs-java-model-2.xCopy head branch name to clipboard