build(deps): bump dawidd6/action-send-mail from 5 to 6

Bumps [dawidd6/action-send-mail](https://github.com/dawidd6/action-send-mail) from 5 to 6.
- [Release notes](https://github.com/dawidd6/action-send-mail/releases)
- [Commits](dawidd6/action-send-mail@v5...v6)

---
updated-dependencies:
- dependency-name: dawidd6/action-send-mail
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/ping-developer.yml

@@ -101,7 +101,7 @@ jobs:
             - name: >-
                   📨 Send mail
               id: task_ping_developer_mail
-              uses: dawidd6/action-send-mail@v5
+              uses: dawidd6/action-send-mail@v6
               with:
                   server_address: ${{ secrets.EMAIL_SMTP }}
                   server_port: 465