Adhere to Prettier formatting

[fabianegli]

This PR makes the template adhere to the Prettier formatting style. Found during development on #1983

PR checklist

• This comment contains a description of changes (with reason)

[edmundmiller]

I forget if this breaks something, we should check the previous changes

[codecov]

Codecov Report

Merging #2021 (0453dfd) into dev (564868f) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##              dev    #2021   +/-   ##
=======================================
  Coverage   63.86%   63.86%           
=======================================
  Files          41       41           
  Lines        4923     4923           
=======================================
  Hits         3144     3144           
  Misses       1779     1779           

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[fabianegli]

This commit introduces both, the # { (line 24) and #{ (line 18) variant. I think it should be fine (based on running the prettier hook on the resulting module from nf_core modules create).