Bump projects/email/checkdmarc from 6003713 to 96b74a6

Bumps [projects/email/checkdmarc](https://github.com/domainaware/checkdmarc) from `6003713` to `96b74a6`.
- [Release notes](https://github.com/domainaware/checkdmarc/releases)
- [Commits](domainaware/checkdmarc@6003713...96b74a6)

---
updated-dependencies:
- dependency-name: projects/email/checkdmarc
  dependency-type: direct:production
...

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