Fix spelling and typos

[abhro]

Checklist

• Appropriate tests were added
• Any code changes were done in a way that does not break public API
• All documentation related to code changes were updated
• The new code follows the contributor guidelines, in particular the SciML Style Guide and COLPRAC.
• Any new documentation only uses public API

Additional context

lambda isn't a reserved keyword in Julia, and it's not used on its own anyway

[abhro]

CI failure: strat presumably for Stratonovich, should it be added to typos.toml?

[ChrisRackauckas]

yes