Fix Node 26 CI failure by removing unsupported pnpm v11 global config

[Copilot]

The build (26.x) GitHub Actions job failed during dependency setup because the workflow invoked a pnpm global config key that is unsupported in pnpm v11. This PR removes the incompatible command from the shared module cache action used by the build pipeline.

• Root cause

  • pnpm config set auto-install-peers false fails on pnpm v11 with ERR_PNPM_CONFIG_SET_UNSUPPORTED_YAML_CONFIG_KEY, stopping the job before install/build.

• Workflow change

  • Updated .github/module-cache/action.yaml to remove the unsupported global config mutation.
  • Kept dependency installation behavior intact via pnpm install.

• Impact scope

  • Affects all workflows/composite actions reusing .github/module-cache, including the failing build (26.x) path.
  • No application/runtime code changes.

# .github/module-cache/action.yaml
- name: Install dependencies
  run: |
    pnpm install
  shell: bash

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