[code-infra] Enable pkg.pr.new PR comments in CI

[Janpot]

Enable pr-comment for the ci-publish action so that pkg.pr.new posts preview install URLs on PRs
Goal is to make preview packages more discoverable for AI tooling inspecting the PR

[pkg-pr-new]

Open in StackBlitz

@mui/internal-babel-plugin-display-name

pnpm add https://pkg.pr.new/mui/mui-public/@mui/internal-babel-plugin-display-name@1238

@mui/internal-babel-plugin-minify-errors

pnpm add https://pkg.pr.new/mui/mui-public/@mui/internal-babel-plugin-minify-errors@1238

@mui/internal-babel-plugin-resolve-imports

pnpm add https://pkg.pr.new/mui/mui-public/@mui/internal-babel-plugin-resolve-imports@1238

@mui/internal-bundle-size-checker

pnpm add https://pkg.pr.new/mui/mui-public/@mui/internal-bundle-size-checker@1238

@mui/internal-code-infra

pnpm add https://pkg.pr.new/mui/mui-public/@mui/internal-code-infra@1238

@mui/internal-netlify-cache

pnpm add https://pkg.pr.new/mui/mui-public/@mui/internal-netlify-cache@1238

@mui/internal-docs-infra

pnpm add https://pkg.pr.new/mui/mui-public/@mui/internal-docs-infra@1238

@mui/internal-test-utils

pnpm add https://pkg.pr.new/mui/mui-public/@mui/internal-test-utils@1238

commit: 3bcc129

[mui-bot]

Bundle size report

Bundle	Parsed size	Gzip size
@base-ui/react	0B(0.00%)	0B(0.00%)
@mui/x-charts-pro	0B(0.00%)	0B(0.00%)

Details of bundle changes

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Check out the code infra dashboard for more information about this PR.