Update 'Add a profile picture (optional)' to strongly recommend adding a picture #161
Description
Change the subheading and text in docs/00-pre-workshop-setup.md under the Profile section to make adding a profile picture strongly recommended.\n\nSuggested text to add or replace the existing line '### Add a profile picture (optional)' with:\n\n### Add a profile picture (strongly recommended)\n\nA profile picture helps people and maintainers recognize you quickly. If you feel comfortable, use a clear photo or avatar so others know who they are communicating with.\n\nPlease add the documentation label and assign to accesswatch.