k3s-io/k3s v1.21.5+k3s1

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This release updates Kubernetes to v1.21.5, and fixes a number of minor issues.

For more details on what's new, see the Kubernetes release notes.

Changes since K3s v1.21.4+k3s1:

• Upgrade Kubernetes to v1.21.5 (#4032)
• Enhance etcd member management to be more reliable (#4010)
• Exposing etcd metrics on the host IP no longer disables the localhost metrics listener (#3986)
• The local kube-apiserver that is available on port 6444 on server nodes now includes the node name in the certificate SAN list (#3962)
• Fix condition for adding Kubernetes endpoints (#3946)
• Addon checksums are now properly updated when successfully applied. (#3921)
• Reset load balancer state during etcd restoration (#3878)

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