[BUG] Action fails when devEngines packageManager is set to pnpm

[nstringham]

Action config

      - uses: FirebaseExtended/action-hosting-deploy@v0
        with:
          repoToken: "${{ secrets.GITHUB_TOKEN }}"
          firebaseServiceAccount: "${{ secrets.FIREBASE_SERVICE_ACCOUNT_OTHELLO_RUST }}"
          channelId: live
          projectId: othello-rust

package.json

"devEngines": {
    "packageManager": {
      "name": "pnpm",
      "version": ">=11"
    },
    "runtime": {
      "name": "node",
      "version": ">=26"
    }
  }

Error message

npm error code EBADDEVENGINES
  npm error EBADDEVENGINES The developer of this package has specified the following through devEngines
  npm error EBADDEVENGINES Invalid devEngines.packageManager
  npm error EBADDEVENGINES Invalid name "pnpm" does not match "npm" for "packageManager"
  npm error EBADDEVENGINES ***
  npm error EBADDEVENGINES   current: *** name: 'npm', version: '11.13.0' ***,
  npm error EBADDEVENGINES   required: *** name: 'pnpm', version: '>=11' ***
  npm error EBADDEVENGINES ***
...
Error: The process '/opt/hostedtoolcache/node/26.2.0/x64/bin/npx' failed with exit code 1
  ***
    conclusion: 'failure',
    output: ***
      title: 'Deploy preview failed',
      summary: "Error: The process '/opt/hostedtoolcache/node/26.2.0/x64/bin/npx' failed with exit code 1"
    ***
  ***

Full logs: https://github.com/nstringham/othello-web-app/actions/runs/26340171515/job/77540738605

Expected behavior

The action works correctly with npm, yarn, or pnpm

Actual behavior

The action fails when using pnpm