ci: use pnpm

[posva]

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[netlify]

✅ Deploy Preview for pinia-official canceled.

Name	Link
🔨 Latest commit	ed3b927
🔍 Latest deploy log	https://app.netlify.com/sites/pinia-official/deploys/62458091009e840009b5fa4b

[codecov-commenter]

Codecov Report

Merging #1179 (ed3b927) into v2 (e4858f9) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##               v2    #1179   +/-   ##
=======================================
  Coverage   98.00%   98.00%           
=======================================
  Files           9        9           
  Lines         400      400           
  Branches      104      104           
=======================================
  Hits          392      392           
  Misses          4        4           
  Partials        4        4           

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