v1.3.0

v1.3.0

New Features:

• Adds support for Check Auto-Provisioning
  See https://blog.healthchecks.io/2023/07/new-feature-check-auto-provisioning/

• User-Agent header now includes OS and architecture in along with
  runitor version.

  Previously runitor used to send:
  runitor/v1.2.0 (+https://bdd.fi/x/runitor)

  After this change it will send an equivalent of:
  runitor/v1.3.0 (linux-amd64 +https://bdd.fi/x/runitor)