feat: update kubelet to 1.20.15

See https://github.com/kubernetes/kubernetes/releases/tag/v1.20.15

Signed-off-by: Andrey Smirnov <andrey.smirnov@talos-systems.com>

Author: smira

Makefile

@@ -5,9 +5,9 @@ TAG ?= $(shell git describe --tag --always --dirty)
 BRANCH ?= $(shell git rev-parse --abbrev-ref HEAD)
 REGISTRY_AND_USERNAME := $(REGISTRY)/$(USERNAME)
 NAME := kubelet
-KUBELET_VER := v1.23.1
-KUBELET_SHA512_AMD64 := 3bab1f30d0fba2094e29a4779e619db49e6918826e22390bbe557201db089427a300976d9c32152a5e44705124bbe22a1f2735816a304518289cbc9407ac751a
-KUBELET_SHA512_ARM64 := 47ef9e0960e7bd122f5770c4732f90e6ed9afe9d8826cecb7a5513d0fc0121a99388d7cf245d7ff6c5365fd26a1d18b00ad33e741158c0ef3a2e4513c7d8e525
+KUBELET_VER := v1.20.15
+KUBELET_SHA512_AMD64 := 9d41cb01dea24986c1d929c81b30ffcf97841a2c6445867f99dcc73e85831f86b13af6861604e453a87ee284ffe4d09e6be72d526f1656fb6cb796f67b097700
+KUBELET_SHA512_ARM64 := 7216fc3d7c4da8bd405c509cb3413b9fdb386d982ecd01a18fc129ffad2e41951e7f57c93d204a44eed0e22ec6f772cbc29fa16b931c640b211ab4c97e235120
 
 BUILD := docker buildx build
 PLATFORM ?= linux/amd64,linux/arm64