release(v0.9.0-alpha.4): prepare release

This is the official v0.9.0-alpha.4 release.

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

CHANGELOG.md

@@ -1,4 +1,25 @@
 
+<a name="v0.9.0-alpha.4"></a>
+## [v0.9.0-alpha.4](https://github.com/talos-systems/talos/compare/v0.9.0-alpha.3...v0.9.0-alpha.4) (2021-03-02)
+
+### Chore
+
+* update provision/upgrade tests to 0.9.0-alpha.3
+
+### Docs
+
+* bump v0.8 release version in the SBCs guides
+* add disk encryption guide
+
+### Feat
+
+* update linux kernel to 5.10.19
+
+### Fix
+
+* ignore 'ENOENT' (no such file directory) on mount
+* move etcd to `cri` containerd runner
+
 <a name="v0.9.0-alpha.3"></a>
 ## [v0.9.0-alpha.3](https://github.com/talos-systems/talos/compare/v0.9.0-alpha.2...v0.9.0-alpha.3) (2021-03-01)
 

website/content/docs/v0.9/Reference/cli.md

@@ -79,7 +79,7 @@ talosctl cluster create [flags]
       --arch string                             cluster architecture (default "amd64")
       --cidr string                             CIDR of the cluster network (IPv4, ULA network for IPv6 is derived in automated way) (default "10.5.0.0/24")
       --cni-bin-path strings                    search path for CNI binaries (VM only) (default [/home/user/.talos/cni/bin])
-      --cni-bundle-url string                   URL to download CNI bundle from (VM only) (default "https://github.com/talos-systems/talos/releases/download/v0.9.0-alpha.3/talosctl-cni-bundle-${ARCH}.tar.gz")
+      --cni-bundle-url string                   URL to download CNI bundle from (VM only) (default "https://github.com/talos-systems/talos/releases/download/v0.9.0-alpha.4/talosctl-cni-bundle-${ARCH}.tar.gz")
       --cni-cache-dir string                    CNI cache directory path (VM only) (default "/home/user/.talos/cni/cache")
       --cni-conf-dir string                     CNI config directory path (VM only) (default "/home/user/.talos/cni/conf.d")
       --cpus string                             the share of CPUs as fraction (each container/VM) (default "2.0")