SasView 6.2.0 Alpha3

This alpha, alongside sasmodels v1.1.0a3, fixes the three new models that were not working -- truncated_octahedron, tetrahedron, and truncated_tetrahedron.

What's Changed

*Don't include magnetism parameters in pure python models by @pkienzle in #3961

• Release 6.2.0 polyhedron html by @sara-mokhtari in #3972

New Contributors

• @sara-mokhtari made their first contribution in #3972

Full Changelog: v6.2.0a2...v6.2.0a3