Release notes can be found at https://docs.projectcalico.org/archive/v3.21/release-notes/
Attached to this release are the following artifacts:
release-v3.21.1.tgz: docker images and kubernetes manifests.calico-windows-v3.21.1.zip: Calico for Windows.tigera-operator-v3.21.1-0.tgz: Calico helm v3 chart.