Pin dependency chart.js to 2.9.4

Author: renovate-bot

package.json

@@ -43,7 +43,7 @@
     "@formatjs/intl-pluralrules": "4.0.1",
     "@sentry/browser": "5.29.2",
     "@sentry/integrations": "5.29.2",
-    "chart.js": "^2.9.4",
+    "chart.js": "2.9.4",
     "copy-text-to-clipboard": "2.2.0",
     "fastboot-app-server": "3.0.0",
     "morgan": "1.10.0",

yarn.lock

@@ -4793,7 +4793,7 @@ charm@^1.0.0:
   dependencies:
     inherits "^2.0.1"
 
-chart.js@^2.9.4:
+chart.js@2.9.4:
   version "2.9.4"
   resolved "https://registry.yarnpkg.com/chart.js/-/chart.js-2.9.4.tgz#0827f9563faffb2dc5c06562f8eb10337d5b9684"
   integrity sha512-B07aAzxcrikjAPyV+01j7BmOpxtQETxTSlQ26BEYJ+3iUkbNKaOJ/nDbT6JjyqYxseM0ON12COHYdU2cTIjC7A==