Project wiki is publicly editable

Hello, not sure if this is intentional but the project's github wiki is publicly editable. I tried adding a page which is visible in the [wiki's git history](https://github.com/vicky002/AlgoWiki/wiki/_history). You might want to review the [access permissions](https://docs.github.com/en/github-ae@latest/communities/documenting-your-project-with-wikis/changing-access-permissions-for-wikis).