build(deps): bump pnpm/action-setup from 4 to 6

[dependabot]

Bumps pnpm/action-setup from 4 to 6.

Release notes

Sourced from pnpm/action-setup's releases.

v6.0.0

Added support for pnpm v11.

v5.0.0

Updated the action to use Node.js 24.

v4.4.0

Updated the action to use Node.js 24.

v4.3.0

What's Changed

• docs: fix the run_install example in the Readme by @​dreyks in pnpm/action-setup#175
• chore: remove unused @types/node-fetch dependency by @​silverwind in pnpm/action-setup#186
• Clarify that package_json_file is relative to GITHUB_WORKSPACE by @​chris-martin in pnpm/action-setup#184
• feat: store caching by @​jrmajor in pnpm/action-setup#188
• refactor: remove star imports by @​KSXGitHub in pnpm/action-setup#196
• fix(ci): exclude macos by @​KSXGitHub in pnpm/action-setup#197

New Contributors

• @​dreyks made their first contribution in pnpm/action-setup#175
• @​silverwind made their first contribution in pnpm/action-setup#186
• @​chris-martin made their first contribution in pnpm/action-setup#184
• @​jrmajor made their first contribution in pnpm/action-setup#188
• @​Boosted-Bonobo made their first contribution in pnpm/action-setup#199

Full Changelog: pnpm/action-setup@v4.2.0...v4.3.0

v4.2.0

When there's a .npmrc file at the root of the repository, pnpm will be fetched from the registry that is specified in that .npmrc file #179

v4.1.0

Add support for package.yaml #156.

Commits

• 0977fd9 docs: Update README to include devEngines.packageManager (#273)
• 48261ac fix: update pnpm to v11.19.0 (#283)
• 75677f7 ci: use pnpm 11 for pr-check (#284)
• 769ae71 refactor: introduce restore keys for cache (#280)
• 6fed91f docs(README): point users to the successor pnpm/setup action (#282)
• 0ebf471 fix: update pnpm to v11.7.0 (#267)
• 0e279bb fix: update pnpm to 11.1.1 (#248)
• 3e83581 fix: drop patchPnpmEnv so standalone+self-update works on Windows (#258)
• 551b42e docs(README): fix cache_dependency_path type (#257)
• 739bfe4 fix: self-update bootstrap to packageManager-pinned version (#233) (#256)
• Additional commits viewable in compare view

[os-project-manager]

·@·d·ependabot r·ebase

Context for the humans reading this later: this PR was mergeable until PR #58 (actions/setup-node 4 → 7) landed a few minutes ago. Both PRs edit .github/workflows/ci.yml and .github/workflows/deploy-docs.yml, and the two uses: lines they change are adjacent — so #58's merge left this branch conflicting. Rebasing is Dependabot's job here rather than a hand-patch on its branch.

The change itself is sound and is expected to go green once rebased: this repo invokes pnpm/action-setup with no version: input and declares "packageManager": "pnpm@10.28.2" in the root package.json, which is exactly the contract v5+ expects. The usual v4→v5+ breakage — "multiple versions of pnpm specified" when both a version: input and packageManager are present — does not apply here.

Reviewed by the repo:objectos PM seat (objectstack#9831), round 1.

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