Bump lib/spm_2_bids from 900627a to 9ea4950 (#1326)

Bumps [lib/spm_2_bids](https://github.com/cpp-lln-lab/spm_2_bids) from `900627a` to `9ea4950`.
- [Release notes](https://github.com/cpp-lln-lab/spm_2_bids/releases)
- [Commits](cpp-lln-lab/spm_2_bids@900627a...9ea4950)

---
updated-dependencies:
- dependency-name: lib/spm_2_bids
  dependency-type: direct:production
...

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