Bump dawidd6/action-send-mail from 3.4.1 to 3.6.1

Bumps [dawidd6/action-send-mail](https://github.com/dawidd6/action-send-mail) from 3.4.1 to 3.6.1.
- [Release notes](https://github.com/dawidd6/action-send-mail/releases)
- [Commits](dawidd6/action-send-mail@v3.4.1...v3.6.1)

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

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

.github/workflows/generate-docs.yml

@@ -9,8 +9,13 @@ defaults:
   run:
     shell: bash
 
+permissions:
+  contents: read
+
 jobs:
   generate:
+    permissions:
+      contents: write  # for Git to git push
     if: github.repository == 'zeek/zeek'
     runs-on: ubuntu-latest
 
@@ -110,7 +115,7 @@ jobs:
         # Only send notifications for scheduled runs. Runs from pull requests
         # show failures in the Github UI.
         if: failure() && github.event_name == 'schedule'
-        uses: dawidd6/action-send-mail@v3.4.1
+        uses: dawidd6/action-send-mail@v3.6.1
         with:
           server_address: ${{secrets.SMTP_HOST}}
           server_port: ${{secrets.SMTP_PORT}}