Arch version constraint fix

[3nprob]

Follow-up to:

• #589
• #586
• #590

CI prevented putting conflicts on latest version and main currently has last released version configured.

Now that 4.3.27 has been releases these can be corrected so that incompatible installation is not supported.

[codecov[bot]]

Codecov Report

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

Project coverage is 70.68%. Comparing base (ad07468) to head (a7b42d7).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #591      +/-   ##
==========================================
- Coverage   71.10%   70.68%   -0.42%     
==========================================
  Files           3        3              
  Lines         481      481              
==========================================
- Hits          342      340       -2     
- Misses        139      141       +2     

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