Bump gitdb/ext/smmap from 5ec977a to e4ad410

Bumps [gitdb/ext/smmap](https://github.com/gitpython-developers/smmap) from `5ec977a` to `e4ad410`.
- [Release notes](https://github.com/gitpython-developers/smmap/releases)
- [Commits](gitpython-developers/smmap@5ec977a...e4ad410)

---
updated-dependencies:
- dependency-name: gitdb/ext/smmap
  dependency-version: e4ad410ac3baf2046bd4043394e7cbb119045cc1
  dependency-type: direct:production
...

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Author: dependabot[bot]