Bump chart.js from 2.9.3 to 2.9.4#8

dependabot[bot] wants to merge 1 commit intomastergasparian/telemetry-monitor:masterfrom

dependabot/npm_and_yarn/chart.js-2.9.4gasparian/telemetry-monitor:dependabot/npm_and_yarn/chart.js-2.9.4Copy head branch name to clipboard