Tell people not to use their package manager's "Julia"

[LilithHafner]

I just got off the phone with someone running into issues with Julia 1.7, recently installed courtesy of their package manager.

[github-actions]

Once the build has completed, you can preview your PR at this URL: https://julialang.netlify.app/previews/PR2089/ in ~15 minutes

[StefanKarpinski]

Might word it to more strongly emphasize that juliaup is recommended and also mentions that using your distro's juliaup package and then letting that install official Julia binaries is a fine way to go.

[LilithHafner]

We already place Juliaup above the official binaries, and I don't want to do too much more than that given the state of https://github.com/JuliaLang/juliaup/milestone/7. If someone is deciding whether or not to use their distro's broken 1.7.1, official binaries and juliaup are both a bit step up.

As for juliaup via package managers/distros, I'm hesitant to recommend that given

Important note: As of now, we strongly recommend to install Juliaup via the Windows Store or curl command above rather than through OS-specific software repositories (see below) as the Juliaup variants provided by the latter currently have some drawbacks (that we hope to lift in the future).

https://github.com/JuliaLang/juliaup?tab=readme-ov-file#software-repositories

[StefanKarpinski]

Ok, carry on then!