Fix #706, Update broken TOC links in CONTRIBUTING.md

[thnkslprpt]

Checklist

• [x] I reviewed the Contributing Guide.
• [x] I signed and emailed the appropriate Contributor License Agreement to [email protected] and copied [email protected].

Describe the contribution

• Fixes #706
  • Generated a new TOC with working links to each section

Testing performed Tested links manually - all working now.

Expected behavior changes Working links in the TOC.

Contributor Info Avi Weiss @thnkslprpt