Update framework/deployment topics for 4.7

[guardrex]

[rpetrusha]

@guardrex, can you specify what you have in mind here? Though I may have missed something, I think that I updated the deployment topics.

[guardrex]

@rpetrusha #1979 (review)

I mentioned this issue over there, so I thought it would cross-ref over here. GitHub has failed me this morning. 😢 Apparently, it just needs the link placed into the body of the comment.

[rpetrusha]

@guardrex, sorry about that. I didn't realize there this was related to an existing PR.

[mairaw]

The reason why I asked @guardrex to create this issue is that the new installation topics that @richlander created don't talk about .NET 4.7, which is our most recent release.

Also, some of the links seem to take you to the wrong page. e.g. https://go.microsoft.com/fwlink/?linkid=845529&source=dotnetdocs. I'd expect that link to take you here instead: https://www.microsoft.com/net/download/framework