Build(deps): Bump third_party/opentitan from 07e0526 to 3cf9984

Bumps [third_party/opentitan](https://github.com/antmicro/opentitan) from `07e0526` to `3cf9984`.
- [Commits](antmicro/opentitan@07e0526...3cf9984)

---
updated-dependencies:
- dependency-name: third_party/opentitan
  dependency-type: direct:production
...

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