chore(deps,substrait)!: bump substrait from 6d481e1 to b6abbb7

Bumps [substrait](https://github.com/substrait-io/substrait) from `6d481e1` to `b6abbb7`.
- [Release notes](https://github.com/substrait-io/substrait/releases)
- [Commits](substrait-io/substrait@6d481e1...b6abbb7)

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updated-dependencies:
- dependency-name: substrait
  dependency-type: direct:production
...

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