GHSA-6HGP-FMHR-MRG4 Highcharts Grid: `javascript:` URL in credits.href runs script on click

Impact An attacker who controls the Grid configuration can set credits.href to a javascript: URL. The value is not validated against an allowed-scheme list before it is applied to the credits link, so activating that link runs attacker-supplied script in the origin of the page hosting the Grid...