🐞 Link to website in README is incorrect

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Current Behavior

Link to website in README is incorrect

### Expected Behavior

Instead of directing one to https://microsoft.github.io/electionguard it should use https://www.electionguard.vote/

### Steps To Reproduce

Click on links to official website in the [README](https://github.com/Election-Tech-Initiative/electionguard/blob/main/README.md)

### Environment

```markdown
NA
```

### Anything else?

_No response_

Start in README.md and locate the official website links referenced in the issue. Update the incorrect destination to https://www.electionguard.vote/ and verify that the README links point to the expected website.

Written by the indexing model from the issue text.