Bump bagel/pipeline-catalog from 841396c to 6a1a4d0 (#399)

Bumps [bagel/pipeline-catalog](https://github.com/nipoppy/pipeline-catalog) from `841396c` to `6a1a4d0`.
- [Commits](nipoppy/pipeline-catalog@841396c...6a1a4d0)

---
updated-dependencies:
- dependency-name: bagel/pipeline-catalog
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>