Bump actions/checkout from 3 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/build.yml

@@ -8,7 +8,7 @@ jobs:
     if: ${{ !contains(github.event.head_commit.message, 'skip ci') }}
     steps:
       - name: Checkout Sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: udm-iptv
       - name: Setup Dependencies

.github/workflows/release.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: [ubuntu-20.04]
     steps:
       - name: Checkout Sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: udm-iptv
           submodules: recursive
@@ -37,7 +37,7 @@ jobs:
     needs: build
     steps:
       - name: Checkout Sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Download Artifacts
         uses: actions/download-artifact@v3
         with: