✨ Typo in docs/index.md

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Suggestion

Typo in penultimate line in second paragraph.
https://github.com/AnshikaSingh100/electionguard/blob/main/docs/index.md#what-is-electionguard

_If you want to help and aren't a developer, all kinds of help with documentation, outreach, and advocacy is **welcomed**._

### Possible Implementation

_No response_

### Anything else?

_No response_