docker-compose: Update to version 2.7.0

What's Changed:

 - Enhancements:

   - add support of environment secret during build step by @glours

 - Fixes:

   - networks: prevent issues due to duplicate names by @milas
   - Use appropriate dependency condition for one-shot containers when
   running compose up --wait by @laurazard
   - Fix environment variable expansion by @ulyssessouza in
   compose-spec/compose-go#276
   - Validate depended-on services exist in consistency check by
   @laurazard in compose-spec/compose-go#281
   - Fix hash usage in environment values by @ulyssessouza in
   compose-spec/compose-go#283
   - build: respect dependency order for classic builder by @milas
   - fix: panic caused by empty string argument by @nicksieger
   - (re)start should not impact one-off containers by @ndeloof
   - Fix issue with close networks name on up and down command by
   @glours
   - keep the container reference when volumes_from target a container
   and not a service by @glours
   - build.go: initialize CustomLabels map if nil by @paroque28

Signed-off-by: Javier Marcet <javier@marcet.info>