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 :warning:
datalad_remake/annexremotes/remake_remote.py	96.55%	0 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ 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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