chore(renovate): disable pnpm version updates in actions

[MikeMcC399]

Situation

Renovate attempts to update the pnpm version in related workflows where the version is specified by the with.version clause using the JavaScript action pnpm/action-setup.

To remain aligned with the README > pnpm documentation section we want to keep:

      - name: Install pnpm
        uses: pnpm/action-setup@v5
        with:
          version: 10

using the major version of pnpm only, without pinning it to an exact pnpm version.

An update to version 11, currently in release candidate status, is also not desired, since this requires manual update and testing of the related example directories.

Change

Disable Renovate updates for the pnpm version in GitHub Action pnpm/action-setup in the renovate.json configuration.

The Renovate configuration uses "matchDepTypes": ["uses-with"].

---

Note

Low Risk
Low risk config-only change that just alters Renovate behavior for GitHub Actions; impact is limited to dependency update PRs (pnpm updates will no longer be proposed).

Overview
Disables Renovate PRs that try to update the pnpm version specified via with.version in GitHub Actions by adding a new packageRules entry matching matchDepTypes: ["uses-with"] for pnpm.

Keeps the existing rule that already disables updates to the pnpm/action-setup action itself, but now also prevents Renovate from proposing pnpm runtime version bumps (e.g., major upgrades) inside workflows.

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