chore(deps): bump rjstone/discord-webhook-notify from 2.1.1 to 2.2.1

Bumps [rjstone/discord-webhook-notify](https://github.com/rjstone/discord-webhook-notify) from 2.1.1 to 2.2.1.
- [Release notes](https://github.com/rjstone/discord-webhook-notify/releases)
- [Commits](https://github.com/rjstone/discord-webhook-notify/compare/a975c85e53c8ea07b0b10f8461b0a90059816dcf...c2597273488aeda841dd1e891321952b51f7996f)

---
updated-dependencies:
- dependency-name: rjstone/discord-webhook-notify
  dependency-version: 2.2.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/docker-build.yml

@@ -124,7 +124,7 @@ jobs:
         build_helpers/publish_docker_arm64.sh
 
     - name: Discord notification
-      uses: rjstone/discord-webhook-notify@a975c85e53c8ea07b0b10f8461b0a90059816dcf #v2.1.1
+      uses: rjstone/discord-webhook-notify@c2597273488aeda841dd1e891321952b51f7996f #v2.2.1
       if: always() && ( github.event_name != 'pull_request' || github.event.pull_request.head.repo.fork == false) && (github.event_name != 'schedule')
       with:
           severity: info