docs: Hide older Sedona document pages from showing up in google searches

Hide older Sedona document pages from don't show up in google searches. We should not completely remove access to the older documentation versions, but just make it so they aren't showing up as top google search results. I often click a link and find that I'm on an older doc page for some reason.

Ran a quick LLM query, and it seems like this is fixable through fixing HTML code somehow. It said something about setting content="noindex" field for a <meta> tag and setting rel="canonical" of a <link> tag. Didn't look into this further, these may or may not work.