Fix `MolecularBasisSet` Ptype

[jwaldrop107]

PR Type

• [ ] Breaking change
• [ ] Feature
• [x] Patch

Brief Description Fix an error in the MolecularBasisSet property type.

Not In Scope

PR Checklist

• [x] Documentation (comments, API, user, design, and developer as applicable)
  • API
  • User
  • Design
  • Developer
• [x] Testing (unit, integration, performance, as applicable)
  • Unit
  • Integration
  • Performance
• [x] Code adheres to organization standards
  • C++
  • Python
  • Doxygen Conventions
  • reST Conventions

[ryanmrichard]

🚀 [bumpr] Bumped! New version:v0.0.8 Changes:v0.0.7...v0.0.8