Add link to avnet's workshop

[rawalexe]

Description

Brief description of the changes in this PR.

Related Issue

Fixes #(issue number) or N/A if not applicable

Type of Change

• Bug fix
• New feature
• Breaking change
• Documentation update
• Performance improvement
• Code refactoring

Checklist

• Code passes all the quality test. Can try nix flake check -L locally
• Documentation updated (if applicable)
• Tests added/updated in
  aws-greengrass-testing
  (if applicable)

Documentation Updates

• Updated README.md if needed
• Updated relevant documentation in docs/ folder
• Requested to update public documentation if applicable (aws internal only)

Testing

• Existing tests pass
• Added tests to
  aws-greengrass-testing repository
• New functionality is covered by tests

Additional Notes

Any additional information, context, or screenshots that would be helpful for
reviewers.

By submitting this pull request, I confirm that you can use, modify, copy, and
redistribute this contribution, under the terms of your choice.