Bump Submodules/amrex from 8349789 to 00e6f75 (#540)

Bumps [Submodules/amrex](https://github.com/AMReX-Codes/amrex) from `8349789` to `00e6f75`.
- [Release notes](https://github.com/AMReX-Codes/amrex/releases)
- [Commits](AMReX-Codes/amrex@8349789...00e6f75)

---
updated-dependencies:
- dependency-name: Submodules/amrex
  dependency-type: direct:production
...

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