docs: extract_info(process=False)

[chapmanjacobd]

Before submitting a pull request make sure you have:

• Searched the bugtracker for similar pull requests
• Read adding new extractor tutorial
• Read youtube-dl coding conventions and adjusted the code to meet them
• Covered the code with tests (note that PRs without tests will be REJECTED)
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• Bug fix
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Description of your pull request and other information

process must be True for download to work, right? maybe we could make that more clear somehow