What's Changed
* Adding energy filter num_dims check to avoid crash by shimwell in https://github.com/fusion-energy/openmc_regular_mesh_plotter/pull/64
* Fixed example by shimwell in https://github.com/fusion-energy/openmc_regular_mesh_plotter/pull/65
**Full Changelog**: https://github.com/fusion-energy/openmc_regular_mesh_plotter/compare/1.2.0...1.2.1