Kubeadm: Update cni, crictl and systemd versions

The section "Installing kubeadm, kubelet and kubectl:Without a package
manager" in the "Installing kubeadm" doc contains outaded versions. The
following has been edited:

- containernetworking/plugins updated to v1.3.0 from v1.2.0
- kubernetes-sigs/cri-tools updated to v1.27.0 from v1.26.0
- kubernetes/release (Kubelet systemd) to v0.15.1 from v0.4.0 (from Aug
  10, 2020 - almost 3 years old!)

Author: mbrav

content/en/docs/setup/production-environment/tools/kubeadm/install-kubeadm.md

@@ -217,7 +217,7 @@ sudo systemctl enable --now kubelet
 Install CNI plugins (required for most pod network):
 
 ```bash
-CNI_PLUGINS_VERSION="v1.2.0"
+CNI_PLUGINS_VERSION="v1.3.0"
 ARCH="amd64"
 DEST="/opt/cni/bin"
 sudo mkdir -p "$DEST"
@@ -239,7 +239,7 @@ sudo mkdir -p "$DOWNLOAD_DIR"
 Install crictl (required for kubeadm / Kubelet Container Runtime Interface (CRI))
 
 ```bash
-CRICTL_VERSION="v1.26.0"
+CRICTL_VERSION="v1.27.0"
 ARCH="amd64"
 curl -L "https://github.com/kubernetes-sigs/cri-tools/releases/download/${CRICTL_VERSION}/crictl-${CRICTL_VERSION}-linux-${ARCH}.tar.gz" | sudo tar -C $DOWNLOAD_DIR -xz
 ```
@@ -253,7 +253,7 @@ cd $DOWNLOAD_DIR
 sudo curl -L --remote-name-all https://dl.k8s.io/release/${RELEASE}/bin/linux/${ARCH}/{kubeadm,kubelet}
 sudo chmod +x {kubeadm,kubelet}
 
-RELEASE_VERSION="v0.4.0"
+RELEASE_VERSION="v0.15.1"
 curl -sSL "https://raw.githubusercontent.com/kubernetes/release/${RELEASE_VERSION}/cmd/kubepkg/templates/latest/deb/kubelet/lib/systemd/system/kubelet.service" | sed "s:/usr/bin:${DOWNLOAD_DIR}:g" | sudo tee /etc/systemd/system/kubelet.service
 sudo mkdir -p /etc/systemd/system/kubelet.service.d
 curl -sSL "https://raw.githubusercontent.com/kubernetes/release/${RELEASE_VERSION}/cmd/kubepkg/templates/latest/deb/kubeadm/10-kubeadm.conf" | sed "s:/usr/bin:${DOWNLOAD_DIR}:g" | sudo tee /etc/systemd/system/kubelet.service.d/10-kubeadm.conf