ntfy-alertmanager v1.0.0

# Added

- Markdown format
- Templates to modify the format of the notification body
- Instead of creating a new notification, resolved alerts can now overwrite the
  notification of the alert (https://docs.ntfy.sh/publish/#updating-deleting-notifications)

# Fixed

- Bug in CORS middleware

Thorben Günther (16):
      docker/helm: Release 0.5.0
      Upgrade dependencies
      Build and publish arm64 Docker images
      Support markdown format
      docker: Build smaller binaries
      docker: Read version from justfile
      Support markdown in multi-alert mode as well
      Fix bugs in multialert message format
      readme: Add note about markdown formatting
      Support templates
      Fix CORS handling
      Upgrade dependencies
      Run "go fix"
      Support notification updates for resolved alerts
      redis: Update deprecated function call
      Prepare for v1.0.0 release

WrenIX (1):
      fix(charts): update version and adjust Probes to health