chore(deps): update actions/checkout action to v6 (#466)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/build_containers.yml

@@ -21,7 +21,7 @@ jobs:
       IS_NOT_PR: "${{ !github.head_ref && true }}"
     steps:
       - name: Checkout Sample-Server
-        uses: actions/checkout@v5.0.1
+        uses: actions/checkout@v6.0.0
         with:
           path: Sample-Server
           submodules: recursive

.github/workflows/git-mirror.yml

@@ -16,7 +16,7 @@ jobs:
       contents: read
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - name: "Sync repo"