Suppress update message if is trigger by desktop

[samuv]

When the thv is bundled with the Desktop app, we don’t need to show the upgrade message because it’s handled by the app’s release cycle.

[codecov]

Codecov Report

❌ Patch coverage is 60.00000% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 66.82%. Comparing base (e836463) to head (72100a6).

Files with missing lines	Patch %	Lines
pkg/desktop/validation.go	60.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3885   +/-   ##
=======================================
  Coverage   66.81%   66.82%           
=======================================
  Files         444      444           
  Lines       44394    44399    +5     
=======================================
+ Hits        29663    29668    +5     
+ Misses      12422    12418    -4     
- Partials     2309     2313    +4     

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