fix(template): Update ci jobs to use nodejs16

[edmundmiller]

https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/

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

nf-core/modules#2238

[codecov]

Codecov Report

Merging #1944 (6bd773f) into dev (ee6b104) will decrease coverage by 7.85%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##              dev    #1944      +/-   ##
==========================================
- Coverage   69.23%   61.38%   -7.86%     
==========================================
  Files          59       37      -22     
  Lines        7148     4677    -2471     
==========================================
- Hits         4949     2871    -2078     
+ Misses       2199     1806     -393     

Impacted Files	Coverage Δ
nf_core/modules/modules_command.py	67.76% <0.00%> (-16.02%)	⬇️
nf_core/modules/modules_repo.py	75.81% <0.00%> (-8.40%)	⬇️
nf_core/modules/modules_differ.py	84.42% <0.00%> (-2.02%)	⬇️
nf_core/modules/lint/main_nf.py	64.61% <0.00%> (-1.16%)	⬇️
nf_core/modules/lint/__init__.py	82.53% <0.00%> (-0.53%)	⬇️
nf_core/modules/info.py	16.54% <0.00%> (-0.50%)	⬇️
nf_core/schema.py	76.07% <0.00%> (-0.21%)	⬇️
nf_core/__main__.py	53.39% <0.00%> (-0.12%)	⬇️
nf_core/modules/nfcore_module.py	100.00% <0.00%> (ø)
nf_core/lint/nextflow_config.py
... and 31 more

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