SNOW-825595: Update setup instruction for non-Windows environment

[sfc-gh-ext-simba-lf]

Description

Update README.md with instructions for building on Non-Windows

Checklist

• [ ] Code compiles correctly
• [ ] Code is formatted according to Coding Conventions
• [ ] Created tests which fail without the change (if possible)
• [ ] All tests passing (dotnet test)
• [ ] Extended the README / documentation, if necessary
• [ ] Provide JIRA issue id (if possible) or GitHub issue id in PR name

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 84.25%. Comparing base (4d85588) to head (28b6d37).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #885 +/- ## ======================================= Coverage 84.25% 84.25% ======================================= Files 88 88 Lines 9400 9400 Branches 886 886 ======================================= Hits 7920 7920 Misses 1248 1248 Partials 232 232 ```

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