Bump gitdb/ext/smmap from 256c5a2 to 04dd210

Bumps [gitdb/ext/smmap](https://github.com/gitpython-developers/smmap) from `256c5a2` to `04dd210`.
- [Commits](gitpython-developers/smmap@256c5a2...04dd210)

---
updated-dependencies:
- dependency-name: gitdb/ext/smmap
  dependency-type: direct:production
...

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

Author: dependabot[bot]