added deep1910 username and pixel color changed on {1,4}

[deep1910]

Checklist

• [x] I ran npm test locally and it passed without errors.

• [x] I only edited the _data/pixels.json file.

• [x] I entered the username in the pixels.json that I'm also using to create this pull request.
• [x] I acknowledge that all my contributions will be made under the project's license.