message: build: fix circleci ipv6 config
  Fix circleci config for ipv6.
  Risk Level: low
  Testing: n/a
  Docs Changes: n/a
  Release Notes: n/a
diff: @@ -60,12 +60,10 @@ jobs:
  - run:
  name: enable ipv6
  command: |
  - cat \<<'EOF' | sudo tee /etc/docker/daemon.json
  - {
  + echo '{
  "ipv6": true,
  "fixed-cidr-v6": "2001:db8:1::/64"
  - }
  - EOF
  + }' | sudo tee /etc/docker/daemon.json
  sudo service docker restart
  - run: dig go.googlesource.com A go.googlesource.com AAAA # Debug IPv6 network issues
  