update readme install methods

[emmyoop]

resolves #9699

Problem

Docs mention homebrew as a way to get releases but we no longer support it.

Solution

Link to official docs on install methods so we don't have to keep it up to date

Checklist

• I have read the contributing guide and understand what's expected of me
• I have run this code in development and it appears to resolve the stated issue
• This PR includes tests, or tests are not required/relevant for this PR
• This PR has no interface changes (e.g. macros, cli, logs, json artifacts, config files, adapter interface, etc) or this PR has already received feedback and approval from Product or DX
• This PR includes type annotations for new and modified functions

[aranke]

LGTM!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.15%. Comparing base (487a532) to head (b5205c9).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #10081      +/-   ##
==========================================
+ Coverage   88.14%   88.15%   +0.01%     
==========================================
  Files         181      181              
  Lines       22700    22722      +22     
==========================================
+ Hits        20008    20031      +23     
+ Misses       2692     2691       -1     

Flag	Coverage Δ
integration	85.47% <ø> (+0.01%)	⬆️
unit	62.37% <ø> (+0.01%)	⬆️

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