chore: prettierignore updates and setup-helm upgrade

[jsjoeio]

• chore: update prettierignore
• chore: upgrade setup-helm 3.4

[codecov]

Codecov Report

Merging #5721 (3fbe4ad) into main (ba44f6c) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5721   +/-   ##
=======================================
  Coverage   72.61%   72.61%           
=======================================
  Files          30       30           
  Lines        1680     1680           
  Branches      368      368           
=======================================
  Hits         1220     1220           
  Misses        397      397           
  Partials       63       63           

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[github-actions]

✨ code-server dev build published to npm for PR #5721!

• Last publish status: success
• Commit: 3fbe4ad

To install in a local project, run:

npm install @coder/code-server-pr@5721

To install globally, run:

npm install -g @coder/code-server-pr@5721