Bump chart.js from 2.9.3 to 2.9.4 (#3556)

Bumps [chart.js](https://github.com/chartjs/Chart.js) from 2.9.3 to 2.9.4.
- [Release notes](https://github.com/chartjs/Chart.js/releases)
- [Commits](https://github.com/chartjs/Chart.js/compare/v2.9.3...v2.9.4)

---
updated-dependencies:
- dependency-name: chart.js
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -315,7 +315,7 @@
     "@typescript-eslint/parser": "^4.0.0",
     "ace-builds": "^1.4.12",
     "ansi_up": "^5.0.0",
-    "chart.js": "^2.9.3",
+    "chart.js": "^2.9.4",
     "circular-dependency-plugin": "^5.2.2",
     "color": "^3.1.2",
     "concurrently": "^5.2.0",