Fixed bug in nf-core list when NXF_HOME is set

[ewels]

Minor bugfix in nf-core list where the pipeline directory was not set when using the NXF_HOME environment variable.

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 #1299 (3f2581d) into dev (9a8572b) will increase coverage by 0.01%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##              dev    #1299      +/-   ##
==========================================
+ Coverage   67.52%   67.54%   +0.01%     
==========================================
  Files          50       50              
  Lines        5607     5607              
==========================================
+ Hits         3786     3787       +1     
+ Misses       1821     1820       -1     

Impacted Files	Coverage Δ
nf_core/list.py	80.65% <0.00%> (ø)
nf_core/modules/lint/main_nf.py	82.75% <0.00%> (-2.07%)	⬇️
nf_core/modules/lint/__init__.py	84.18% <0.00%> (+1.39%)	⬆️
nf_core/modules/lint/module_version.py	84.61% <0.00%> (+3.84%)	⬆️

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[drpatelh]

👌🏽