chore(deps): bump dawidd6/action-send-mail from 6 to 7

Bumps [dawidd6/action-send-mail](https://github.com/dawidd6/action-send-mail) from 6 to 7.
- [Release notes](https://github.com/dawidd6/action-send-mail/releases)
- [Commits](dawidd6/action-send-mail@v6...v7)

---
updated-dependencies:
- dependency-name: dawidd6/action-send-mail
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/regression_reusable.yaml

@@ -166,7 +166,7 @@ jobs:
           name: cli-coverage
           path: cli_coverage.json
       - name: ✉ Mail failure report
-        uses: dawidd6/action-send-mail@v6
+        uses: dawidd6/action-send-mail@v7
         if: (success() || failure()) && steps.testing-step.outcome != 'success' && env.CI_FAIL_MAILS && github.event_name == 'schedule'
         with:
           server_address: smtp.gmail.com

.github/workflows/upgrade_reusable.yaml

@@ -102,7 +102,7 @@ jobs:
           name: cli-coverage
           path: cli_coverage.json
       - name: ✉ Mail failure report
-        uses: dawidd6/action-send-mail@v6
+        uses: dawidd6/action-send-mail@v7
         if: (success() || failure()) && steps.testing-step.outcome != 'success' && env.CI_FAIL_MAILS && github.event_name == 'schedule'
         with:
           server_address: smtp.gmail.com