Bump gitdb/ext/smmap from 801bd6f to 5ec977a

Bumps [gitdb/ext/smmap](https://github.com/gitpython-developers/smmap) from `801bd6f` to `5ec977a`.
- [Release notes](https://github.com/gitpython-developers/smmap/releases)
- [Commits](gitpython-developers/smmap@801bd6f...5ec977a)

---
updated-dependencies:
- dependency-name: gitdb/ext/smmap
  dependency-version: 5ec977a3b280e5dccb40cb20eba56ea26a84bd48
  dependency-type: direct:production
...

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

Author: dependabot[bot]