chore(deps): bump the github-actions group across 1 directory with 3 updates

Bumps the github-actions group with 3 updates in the / directory: [actions/checkout](https://github.com/actions/checkout), [pnpm/action-setup](https://github.com/pnpm/action-setup) and [actions/setup-node](https://github.com/actions/setup-node).


Updates `actions/checkout` from 3 to 6
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v6)

Updates `pnpm/action-setup` from 4 to 6
- [Release notes](https://github.com/pnpm/action-setup/releases)
- [Commits](pnpm/action-setup@v4...v6)

Updates `actions/setup-node` from 3 to 6
- [Release notes](https://github.com/actions/setup-node/releases)
- [Commits](actions/setup-node@v3...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
- dependency-name: actions/setup-node
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
- dependency-name: pnpm/action-setup
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/main.yml

@@ -11,11 +11,11 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: pnpm/action-setup@v4
+      - uses: actions/checkout@v6
+      - uses: pnpm/action-setup@v6
         with:
           version: 9
-      - uses: actions/setup-node@v3
+      - uses: actions/setup-node@v6
         with:
           node-version: 22.13
           cache: "pnpm"

.github/workflows/preview.yml

@@ -22,11 +22,11 @@ jobs:
   preview:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: pnpm/action-setup@v4
+      - uses: actions/checkout@v6
+      - uses: pnpm/action-setup@v6
         with:
           version: 9
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v6
         with:
           node-version: 22.13
           cache: pnpm