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] <support@github.com>

.github/workflows/dependabot-build.yml

@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           ref: ${{ github.head_ref || github.ref  }}
           token: ${{ secrets.REBUILD_PUSH_TOKEN }}

.github/workflows/ecbuild.yml

@@ -35,10 +35,10 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Checkout ecbuild Repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: ecmwf/ecbuild
           ref: develop

.github/workflows/eckit.yml

@@ -62,10 +62,10 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Checkout eckit Repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: ecmwf/eckit
           ref: develop

.github/workflows/odc.yml

@@ -62,10 +62,10 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Checkout odc Repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: ecmwf/odc
           ref: develop

.github/workflows/pyodc.yml

@@ -62,10 +62,10 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Checkout pyodc Repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: ecmwf/pyodc
           ref: develop