feat: add label to compute instruction URL

[christian-monch]

Addresses issue #51

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 94.01198% with 10 lines in your changes missing coverage. Please review.

Project coverage is 91.60%. Comparing base (0e725dc) to head (592f6e6).

Files with missing lines	Patch %	Lines
datalad_remake/annexremotes/tests/utils.py	86.76%	7 Missing and 2 partials ⚠️
datalad_remake/annexremotes/remake_remote.py	96.55%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #52      +/-   ##
==========================================
- Coverage   91.87%   91.60%   -0.28%     
==========================================
  Files          21       23       +2     
  Lines         874      965      +91     
  Branches       69       77       +8     
==========================================
+ Hits          803      884      +81     
- Misses         51       59       +8     
- Partials       20       22       +2     

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