Bump docs/src/BcdiCore.jl from c6feb4b to 2d81b7f

Bumps [docs/src/BcdiCore.jl](https://github.com/byu-cxi/BcdiCore.jl) from `c6feb4b` to `2d81b7f`.
- [Release notes](https://github.com/byu-cxi/BcdiCore.jl/releases)
- [Commits](byu-cxi/BcdiCore.jl@c6feb4b...2d81b7f)

---
updated-dependencies:
- dependency-name: docs/src/BcdiCore.jl
  dependency-type: direct:production
...

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