ci: fix pack.mjs

[KermanX]

pnpm changed its console output format

[netlify]

❌ Deploy Preview for slidev failed.

Name	Link
🔨 Latest commit	af66b75
🔍 Latest deploy log	https://app.netlify.com/sites/slidev/deploys/673eaadd7041500008d3b322

[pkg-pr-new]

Open in Stackblitz

@slidev/client

pnpm add https://pkg.pr.new/slidevjs/slidev/@slidev/client@1952

create-slidev

pnpm add https://pkg.pr.new/slidevjs/slidev/create-slidev@1952

@slidev/parser

pnpm add https://pkg.pr.new/slidevjs/slidev/@slidev/parser@1952

create-slidev-theme

pnpm add https://pkg.pr.new/slidevjs/slidev/create-slidev-theme@1952

@slidev/cli

pnpm add https://pkg.pr.new/slidevjs/slidev/@slidev/cli@1952

@slidev/types

pnpm add https://pkg.pr.new/slidevjs/slidev/@slidev/types@1952

commit: af66b75