sidekiq: Make `gds govuk connect sidekiq-monitoring` the default command
sidekiq: Make `gds govuk connect sidekiq-monitoring` the default command

- People who use the modern tooling won't necessarily have our SSH
  config set up - and this command is easier to understand as it
  explicitly states what it's doing.

alphagov/govuk-developer-docs,alphagov/govuk-developer-docs,alphagov/govuk-developer-docs,alphagov/govuk-developer-docs