Old docs site causes confusion

[jnrbsn]

When I google "redis python", the old docs site is on the first page of results and the new docs site is not. It took me a while to realize I was looking at outdated docs, and then I wasted some more time trying to figure out why the docs were outdated, and I was about to create an issue for that, only to discover that there's another docs site I should have been looking at. Maybe there should be some sort of banner or prominent message on the old docs site directing people to the new one?