Rename mkuimage -> uimage make

[hugelgupf]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 42 lines in your changes missing coverage. Please review.

Project coverage is 75.54%. Comparing base (2765692) to head (1d7d9b0).
Report is 9 commits behind head on main.

Files	Patch %	Lines
cmd/uimage/main.go	46.83%	39 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #29      +/-   ##
==========================================
- Coverage   77.37%   75.54%   -1.83%     
==========================================
  Files          23       23              
  Lines        1463     1509      +46     
==========================================
+ Hits         1132     1140       +8     
- Misses        230      267      +37     
- Partials      101      102       +1     

Flag	Coverage Δ
ubuntu-latest-unit	75.54% <50.00%> (-1.83%)	⬇️

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