ci(deps): update actions/checkout action to v6

.github/workflows/docker.yml

@@ -31,7 +31,7 @@ jobs:
       matrix: ${{ steps.matrix.outputs.matrix }}
     steps:
       - name: Checkout Code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Load version matrix
         id: matrix
         env:
@@ -55,7 +55,7 @@ jobs:
       matrix: ${{ fromJSON(needs.setup.outputs.matrix) }}
     steps:
       - name: Checkout Code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with: {submodules: recursive}
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3

.github/workflows/readme.yml

@@ -10,7 +10,7 @@ jobs:
     name: Docker Hub Description
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Update Docker Hub Description
       uses: peter-evans/dockerhub-description@v5
       with:

.github/workflows/update.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Fetch Latest Versions
         # "download" source corresponds to the latest stable version.
         # "development" source corresponds to the latest dev version.