build(deps): bump actions/checkout from 5 to 6 (#3327)

Author: dependabot[bot]

.github/workflows/docker-images.yaml

@@ -37,7 +37,7 @@ jobs:
       packages: read
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 1
       - name: Install Task
@@ -62,7 +62,7 @@ jobs:
       contents: read
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 1
       - name: Install Task

.github/workflows/validate.yaml

@@ -60,7 +60,7 @@ jobs:
             TOX_EXTRA_COMMAND: "- black --check --diff ./rdflib"
             TOXENV_SUFFIX: "-lxml"
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Cache XDG_CACHE_HOME
         uses: actions/cache@v4
         with:
@@ -127,7 +127,7 @@ jobs:
           - task: "gha:lint"
             python-version: 3.9
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Cache XDG_CACHE_HOME
         uses: actions/cache@v4
         with: