[CI] Fix broken image in first-time contributor message

[leecalcote]

Current Behavior

Implementation

See the .github/config.yml

Acceptance Tests

Image displays.

Contributor Guide and Resources

• 📚 Instructions for contributing to documentation
  • Layer5 documentation site and source
• 🎨 Wireframes and designs for Layer5 site in Figma (open invite)
• 🙋🏾🙋🏼 Questions: Layer5 Discussion Forum and Layer5 Community Slack

[Rudra2637]

would like to work on this

[aprv10]

I'd like to work on this if its available

[yashnagar67]

hi @leecalcote i akready work with docs can you assign this task to me

[nafisa404]

@leecalcote would like to work on this as well.

[WildTrio]

@leecalcote would like to work on this