Update Project Profile: Hackforla.org Website Remove Ryan Keller

### Prerequisites
1. Be a member of Hack for LA. (There are no fees to join.) If you have not joined yet, please follow the steps on our [Getting Started](https://www.hackforla.org/getting-started) page and attend an onboarding session.
2. You have already read our [How to Contribute to Hack for LA Guide](https://github.com/hackforla/website/blob/gh-pages/CONTRIBUTING.md).

### Overview
We need to keep project information up to date so that visitors to the website can find accurate information.

### Action Items
- [ ] In your IDE, open the `_projects/website.md` file.
- [ ] Observe the existing syntax of the front matter block [^1] in the file.
- [ ] Find the `leadership` variable and remove the following:
```
- name: Ryan Keller
github-handle: ryanfkeller
role: Merge Team
links:
slack: https://hackforla.slack.com/team/U08SCL4KK3N
github: https://github.com/ryanfkeller
picture: https://avatars.githubusercontent.com/ryanfkeller
```
- [ ] Verify the changes by viewing the following in your local environment and include before and after screenshots with your pull request:
- [ ] Hackforla.org Website page [^2]

### Resources/Instructions
[^1]: [Info about the front matter block](https://jekyllrb.com/docs/front-matter/)
[^2]: Project detailed info page URL: [https://www.hackforla.org/projects/website](https://www.hackforla.org/projects/website)

Open _projects/website.md and inspect the leadership variable and its front matter syntax. Remove the Ryan Keller entry, then run the site locally and view the Hackforla.org Website project page. Done means the entry is absent and the pull request includes before-and-after screenshots.

Written by the indexing model from the issue text.