Bump Features/DFCI from de8bb4d to 703b25e (#1326)

Bumps [Features/DFCI](https://github.com/microsoft/mu_feature_dfci) from `de8bb4d` to `703b25e`.
- [Release notes](https://github.com/microsoft/mu_feature_dfci/releases)
- [Commits](microsoft/mu_feature_dfci@de8bb4d...703b25e)

---
updated-dependencies:
- dependency-name: Features/DFCI
  dependency-type: direct:production
...

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