Bump leaflet from 1.6.0 to 1.7.1 in /web
Bump leaflet from 1.6.0 to 1.7.1 in /web

Bumps [leaflet](https://github.com/Leaflet/Leaflet) from 1.6.0 to 1.7.1.
- [Release notes](https://github.com/Leaflet/Leaflet/releases)
- [Changelog](https://github.com/Leaflet/Leaflet/blob/master/CHANGELOG.md)
- [Commits](https://github.com/Leaflet/Leaflet/compare/v1.6.0...v1.7.1)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
frafra/is-osm-uptodate,frafra/is-osm-uptodate