docs: update Creative Commons license link to HTTPS by dhruvatr · Pull Request #1189 · realpython/python-guide

Changed pages include:

• index.html - view
• 404.html - view
• 404/index.html - view
• genindex/index.html - view
• search/index.html - view
• dev/env/index.html - view
• dev/pip-virtualenv/index.html - view
• dev/virtualenvs/index.html - view
• intro/community/index.html - view
• intro/documentation/index.html - view

There are more changes not included in the list