chore: normalise engines.node to >=22 + bump pnpm to 10.32.1

[benhigham]

What

Normalise engines.node to match other config repos and bump pnpm.

Changes

• engines.node: >=22.15.0 → >=22 (consistency with commitlint-config convention)
• packageManager: pnpm@10.15.0 → pnpm@10.32.1
• Changeset: patch bump (no functional change)

[Copilot]

Pull request overview

Normalizes the repository’s Node engine requirement and bumps the declared pnpm version to align with other related config repos, plus adds a Changesets entry for the release.

Changes:

• Relax engines.node from >=22.15.0 to >=22.
• Bump packageManager from pnpm@10.15.0 to pnpm@10.32.1.
• Add a patch changeset documenting the above.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
package.json	Updates Node engine range and the pinned pnpm version via packageManager.
.changeset/drop-node-20.md	Adds a patch changeset describing the Node engine normalization and pnpm bump.

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