Bump lib/slice_display from 4326779 to 2b506f9 (#1359)

Bumps [lib/slice_display](https://github.com/cpp-lln-lab/slice_display) from `4326779` to `2b506f9`.
- [Commits](cpp-lln-lab/slice_display@4326779...2b506f9)

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

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Author: dependabot[bot]