Bump actions/checkout from 2 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2...v4)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v2
         with:
           version: 8

.github/workflows/npm-publish.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v2
         with:
           version: 8

.github/workflows/release.yml

@@ -30,7 +30,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: [release]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v2
         with:
           version: 8