fix url when generating assets logo

[mirpedrol]

Fix linting error where log didn't match the template nf-core/pangenome#135 (comment)

PR checklist

• This comment contains a description of changes (with reason)
• CHANGELOG.md is updated
• If you've fixed a bug or added code that should be tested, add tests!
• Documentation in docs is updated

[codecov]

Codecov Report

Merging #2337 (ee00670) into dev (b223002) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##              dev    #2337   +/-   ##
=======================================
  Coverage   73.09%   73.09%           
=======================================
  Files          78       78           
  Lines        8780     8780           
=======================================
  Hits         6418     6418           
  Misses       2362     2362           

Impacted Files	Coverage Δ
nf_core/create.py	83.33% <100.00%> (ø)