Bump actions/checkout from 4 to 5 (msgpack#909)

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 5.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/CI.yml

@@ -15,7 +15,7 @@ jobs:
       docs: ${{ steps.changes.outputs.docs }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - uses: dorny/paths-filter@v3
         id: changes
         with:
@@ -39,7 +39,7 @@ jobs:
     needs: changes
     if: ${{ needs.changes.outputs.code == 'true' }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: jcheckstyle
         run: ./sbt jcheckStyle
       - name: scalafmtCheckAll
@@ -54,7 +54,7 @@ jobs:
       matrix:
         java: ['8', '11', '17', '21', '24']
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-java@v4
         with:
           distribution: 'zulu'

.github/workflows/release.yml

@@ -11,7 +11,7 @@ jobs:
     name: Release
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 10000
       # Fetch all tags so that sbt-dynver can find the previous release version

.github/workflows/snapshot.yml

@@ -16,7 +16,7 @@ jobs:
     name: Publish snapshots
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 10000
       # Fetch all tags so that sbt-dynver can find the previous release version