Fix a off by 1 bug in assigning tiles names to Nimbo tiles.

[joa-quim]

No description provided.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.83%. Comparing base (bb7cd1c) to head (ad3bc1b).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1737      +/-   ##
==========================================
- Coverage   85.86%   85.83%   -0.03%     
==========================================
  Files         167      167              
  Lines       23743    23743              
==========================================
- Hits        20386    20380       -6     
- Misses       3357     3363       +6     

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