ci(release): drop pnpm with.version so packageManager wins

[GSTJ]

Summary

Hotfix for the 🚀 Publish workflow on main, which has failed twice consecutively after PR #166 was merged (at 05:39 UTC).

The error is not an npm auth issue but a pnpm version conflict:

Error: Multiple versions of pnpm specified:
  - version 9 in the GitHub Action config with the key "version"
  - version pnpm@9.15.9 in the package.json with the key "packageManager"
Remove one of these versions to avoid version mismatch errors like ERR_PNPM_BAD_PM_VERSION

The prior orchestrator commit (479ad40) bumped pnpm/action-setup from v2/version: 8 to v4/version: 9 but left with.version in place, conflicting with packageManager: pnpm@9.15.9 in package.json.

This PR drops with.version entirely so packageManager wins — mirroring the successful fix applied to branch-validation.yml in commit fa0675c.

Test plan

• Branch checkup CI passes
• 🚀 Publish workflow succeeds on main after merge
• npm view react-native-magic-modal version shows the new 7.x release

[Copilot]

Pull request overview

Removes the explicit version: 9 input from the pnpm/action-setup@v4 step in the publish workflow so the packageManager field in package.json (pnpm@9.15.9) is the sole source of truth, resolving the ERR_PNPM_BAD_PM_VERSION failure on main.

Changes:

• Drop with.version: 9 from the Setup PNPM step in .github/workflows/release.yml.

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[GSTJ]

Heads up — the Publish workflow downstream of this PR (run https://github.com/GSTJ/react-native-magic-modal/actions/runs/26082273487) failed at the npm publish step with HTTP 403.

Root cause: the current NPM_TOKEN secret is a token type that requires an interactive 2FA OTP at publish time, which CI can't provide.

Fix: rotate NPM_TOKEN to a Granular Access Token with Bypass 2FA for publishing enabled, scoped to the react-native-magic-modal package with write permission. Full step-by-step in the follow-up issue.

Also opened #179 to pre-stamp the version at 7.0.0 so the next publish run picks up the SDK 55 breaking-bump version verbatim (release-it was computing a patch because the most recent commits on main aren't feat!:).