Remove variant from base tag

[mauromorales]

My bad, when I originally added the base-image function to naming.sh I included this bug, I have already fixed it on naming.sh so here is the PR to keep them in sync

[codecov]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (29fc485) 50.45% compared to head (262e352) 50.45%.

Files	Patch %	Lines
versioneer/versioneer.go	57.14%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #60      +/-   ##
==========================================
- Coverage   50.45%   50.45%   -0.01%     
==========================================
  Files          16       16              
  Lines        1306     1312       +6     
==========================================
+ Hits          659      662       +3     
- Misses        551      553       +2     
- Partials       96       97       +1     

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