Bump docker-compose to v2.22.0

[jkburges]

Version v2.21.0 includes a "fix for incorrect proxy variables during build" - docker/compose#10908. Thought I may as well go for the latest at time of writing.

In some of my Buildkite builds, the docker compose bug is causing failures during docker compose build commands, due to missing env vars, e.g.:

WARN[0000] The "HOME" variable is not set. Defaulting to a blank string.
--
  | WARN[0000] The "USER" variable is not set. Defaulting to a blank string.
  | WARN[0000] The "PWD" variable is not set. Defaulting to a blank string.
  | WARN[0000] The "PWD" variable is not set. Defaulting to a blank string.
  | WARN[0000] The "SSH_AUTH_SOCK" variable is not set. Defaulting to a blank string.
  | WARN[0000] The "HOME" variable is not set. Defaulting to a blank string.
  | WARN[0000] The "HOME" variable is not set. Defaulting to a blank string.


2 error(s) decoding:
--
  |  
  | * error decoding 'volumes[0]': invalid spec: :/app: empty section between colons
  | * error decoding 'volumes[2]': invalid spec: :/ssh-agent: empty section between colons

[triarius]

Thanks! LGTM