docs.sourcegraph.com search broken

Created by: beyang

Repro:

• Go to https://docs.sourcegraph.com/
• Search for something in the "Search docs" bar in the upper right corner
• Arrive at this URL (https://docs.sourcegraph.com/search?q=asdf&v=) with the following error:

Possibly related to https://github.com/sourcegraph/sourcegraph/pull/8892?