Rename Dev Tools folder icon

[jonesbusy]

Rename Dev Tools folder icon

Only description and message changes to reflect: https://github.com/jenkinsci/oss-symbols-api-plugin

Testing done

Submitter checklist

• Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
• Ensure that the pull request title represents the desired changelog entry
• Please describe what you did
• Link to relevant issues in GitHub or Jira
• Link to relevant pull requests, esp. upstream and downstream changes
• Ensure you have provided tests - that demonstrates feature works or fixes the issue