Corrected importorskip for PyLD (corrected to pyld)

[francescalb]

Description

closes #427

Type of change

• Bug fix and code cleanup
• New feature
• Documentation update
• Testing

Checklist for the reviewer

This checklist should be used as a help for the reviewer.

• Is the change limited to one issue?
• Does this PR close the issue?
• Is the code easy to read and understand?
• Do all new feature have an accompanying new test?
• Has the documentation been updated as necessary?
• Is the code properly tested?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.48%. Comparing base (17c0093) to head (abba4ef).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #428      +/-   ##
==========================================
+ Coverage   76.52%   83.48%   +6.96%     
==========================================
  Files          28       28              
  Lines        4008     4008              
==========================================
+ Hits         3067     3346     +279     
+ Misses        941      662     -279     

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[jesper-friis]

good fix