Bump actions/checkout from 5.0.0 to 6.0.0 (#8833)

Bumps [actions/checkout](https://github.com/actions/checkout) from 5.0.0 to 6.0.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5.0.0...v6.0.0)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/build.yml

@@ -63,7 +63,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5.0.0
+        uses: actions/checkout@v6.0.0
 
       - name: Setup vcpkg (Windows)
         run: gh run download -n vcpkg-cache -D C:/vcpkg/installed/

.github/workflows/check-links.yml

@@ -23,7 +23,7 @@ jobs:
 
     steps:
     - name: Checkout the repository
-      uses: actions/checkout@v5.0.0
+      uses: actions/checkout@v6.0.0
 
     - name: Link Checker
       id: lychee

.github/workflows/ci-caches.yml

@@ -116,7 +116,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5.0.0
+        uses: actions/checkout@v6.0.0
 
       - name: Download GSHHG and DCW datasets
         run: bash ci/download-coastlines.sh
@@ -135,7 +135,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5.0.0
+        uses: actions/checkout@v6.0.0
 
       - name: Install vcpkg libraries
         run: bash ci/install-dependencies-windows.sh

.github/workflows/code-validator.yml

@@ -25,7 +25,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out repository
-        uses: actions/checkout@v5.0.0
+        uses: actions/checkout@v6.0.0
 
       - name: Check PSL_strings.h
         run: |

.github/workflows/docker.yml

@@ -88,7 +88,7 @@ jobs:
           fi
 
       - name: Checkout
-        uses: actions/checkout@v5.0.0
+        uses: actions/checkout@v6.0.0
 
       # Fix the git error:
       # "failed to run git: fatal: detected dubious ownership in repository at '/__w/gmt/gmt'"

.github/workflows/docs.yml

@@ -57,7 +57,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5.0.0
+        uses: actions/checkout@v6.0.0
 
       - name: Setup vcpkg (Windows)
         run: gh run download -n vcpkg-cache -D C:/vcpkg/installed/
@@ -138,7 +138,7 @@ jobs:
           echo "${INSTALLDIR}/bin" >> $GITHUB_PATH
 
       - name: Checkout the gh-pages branch in a separate folder
-        uses: actions/checkout@v5.0.0
+        uses: actions/checkout@v6.0.0
         with:
           ref: gh-pages
           # Checkout to this folder instead of the current one

.github/workflows/dvc-diff.yml

@@ -28,7 +28,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v5.0.0
+      uses: actions/checkout@v6.0.0
 
     - name: Setup data version control (DVC)
       uses: iterative/setup-dvc@v2

.github/workflows/lint-checker.yml

@@ -17,7 +17,7 @@ jobs:
 
     steps:
     - name: Check out repository
-      uses: actions/checkout@v5.0.0
+      uses: actions/checkout@v6.0.0
 
     - name: Install cppcheck
       run: |

.github/workflows/release-baseline-images.yml

@@ -20,7 +20,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v5.0.0
+      uses: actions/checkout@v6.0.0
 
     - name: Setup data version control (DVC)
       uses: iterative/setup-dvc@v2

.github/workflows/remind.yml

@@ -17,7 +17,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v5.0.0
+      uses: actions/checkout@v6.0.0
 
     - name: Find and report known failures
       run: |