don't write file when applying a patch during update

[mirpedrol]

Close #2014

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 #2017 (800d180) into dev (8e81fe8) will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##              dev    #2017      +/-   ##
==========================================
+ Coverage   63.84%   63.86%   +0.02%     
==========================================
  Files          41       41              
  Lines        4923     4923              
==========================================
+ Hits         3143     3144       +1     
+ Misses       1780     1779       -1     

Impacted Files	Coverage Δ
nf_core/modules/modules_differ.py	84.92% <0.00%> (+0.50%)	⬆️

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[mashehu]

Could you maybe add a test for this?

[mirpedrol]

Could you maybe add a test for this?

good idea :) I will add it before merging