Change notes for edge-21.6.4 (#6370) ## edge-21.6.4 This release contains a few improvements, from many contributors! Also under the hood, the destination service has received updates in preparation to the upcoming support for StatefulSets across multicluster. * Improved the `linkerd check --proxy` command to avoid hitting a timeout when dealing with large clusters * Fixed the web component permissions in order to properly run the podCIDR check (thanks @aryan9600!) * Avoid having the proxy-init container fail when the main container is configured to drop either the NET_RAW or NET_ADMIN capabilities (thanks @aryan9600!) * Upgraded the proxy-init image to improve the output in "simulate" mode (thanks @liuerfire!) and to log to stdout instead of stderr (thanks @mo4islona!) * Added test-coverage reports to PRs (thanks @akshitgrover!)