Bump dawidd6/action-send-mail from 6 to 7 (#1829)

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@6d98ae3...6e71c85)

---
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]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/deploy.yaml

@@ -47,7 +47,7 @@ jobs:
       - name: Send mail
         # The explicit commit hash ensures that this can't be used by dawidd6 as a
         # backdoor to execute arbitrary code during our runs.
-        uses: dawidd6/action-send-mail@6d98ae34d733f9a723a9e04e94f2f24ba05e1402 # v6
+        uses: dawidd6/action-send-mail@6e71c855c9a091d80a519621b9fd3e8d252ca40c # v7
         with:
           # Currently using my (Marcel's) mail server for sending mails.
           server_address: typesetting.eu
@@ -70,7 +70,7 @@ jobs:
             More information can be found at
             ${{steps.release.outputs.html_url}}
       - name: Send failure notification
-        uses: dawidd6/action-send-mail@6d98ae34d733f9a723a9e04e94f2f24ba05e1402 # v6
+        uses: dawidd6/action-send-mail@6e71c855c9a091d80a519621b9fd3e8d252ca40c # v7
         if: ${{ failure() }}
         with:
           server_address: typesetting.eu

.github/workflows/main.yaml

@@ -89,7 +89,7 @@ jobs:
       - name: Send mail
         # The explicit commit hash ensures that this can't be used by dawidd6 as a
         # backdoor to execute arbitrary code during our runs.
-        uses: dawidd6/action-send-mail@6d98ae34d733f9a723a9e04e94f2f24ba05e1402 # v6
+        uses: dawidd6/action-send-mail@6e71c855c9a091d80a519621b9fd3e8d252ca40c # v7
         with:
           # Currently using my (Marcel's) mail server for sending mails.
           server_address: typesetting.eu