Bump _data/popolo-data from 857b5dd to 29b949d

Bumps [_data/popolo-data](https://github.com/SomethingNewUK/popolo-data) from `857b5dd` to `29b949d`.
- [Commits](SomethingNewUK/popolo-data@857b5dd...29b949d)

---
updated-dependencies:
- dependency-name: _data/popolo-data
  dependency-type: direct:production
...

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