Prepare release notes for 1.6.4

[dmcgowan]

See generated notes https://gist.github.com/dmcgowan/7604d2f3cac5da03a378f5716a8c40db

[fuweid]

➜  plugins git:(1f33fb7) sudo crictl info | grep  Networks -A 20
    "Networks": [
      {
        "Config": {
          "Name": "cni-loopback",
          "CNIVersion": "0.3.1",
          "Plugins": [
            {
              "Network": {
                "type": "loopback",
                "ipam": {},
                "dns": {}
              },
              "Source": "{\"type\":\"loopback\"}"
            }
          ],
          "Source": "{\n\"cniVersion\": \"0.3.1\",\n\"name\": \"cni-loopback\",\n\"plugins\": [{\n  \"type\": \"loopback\"\n}]\n}"
        },
        "IFName": "lo"
      },
      {
        "Config": {
➜  plugins git:(1f33fb7) sudo ctr version
Client:
  Version:  v1.6.3-6-gdb40e2128
  Revision: db40e2128423009c12d71390f7fb7ee0eca82ba8
  Go version: go1.18.1

Server:
  Version:  v1.6.3-6-gdb40e2128
  Revision: db40e2128423009c12d71390f7fb7ee0eca82ba8
  UUID: 65abd2a4-3b34-4ec0-b2f4-9ceba3551aab

Verified in my local. I am going to merge it.