Bump lib/spm_2_bids from bc20418 to dd8c9cc (#1402)

Bumps [lib/spm_2_bids](https://github.com/cpp-lln-lab/spm_2_bids) from `bc20418` to `dd8c9cc`.
- [Release notes](https://github.com/cpp-lln-lab/spm_2_bids/releases)
- [Commits](cpp-lln-lab/spm_2_bids@bc20418...dd8c9cc)

---
updated-dependencies:
- dependency-name: lib/spm_2_bids
  dependency-version: dd8c9cc413ba33d0b913cefe1226d78edb0e4c8f
  dependency-type: direct:production
...

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Author: dependabot[bot]