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

.github/workflows/check-pre-commit.yml

@@ -10,7 +10,7 @@ jobs:
   actionlint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Download actionlint
         run: bash <(curl https://raw.githubusercontent.com/rhysd/actionlint/main/scripts/download-actionlint.bash)
         shell: bash
@@ -22,7 +22,7 @@ jobs:
     name: Check if automatic project update was successful
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Fail if .rej files exist as structure update was not successful
         run: test -z "$(find . -iname '*.rej')"
 
@@ -33,7 +33,7 @@ jobs:
       group: markdown-${{ github.event.pull_request.number || github.ref }}
       cancel-in-progress: true
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/actions/python-poetry-env
         # Skipped checks are tested elsewhere
       - run: SKIP=cspell,ruff,mypy poetry run pre-commit run --all-files

.github/workflows/check-python.yml

@@ -16,7 +16,7 @@ jobs:
         python-version: ["3.10", "3.11", "3.12-dev"]
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/actions/python-poetry-env
         with:
           python-version: ${{ matrix.python-version }}

.github/workflows/check-spelling.yml

@@ -19,5 +19,5 @@ jobs:
       group: spelling-${{ github.event.pull_request.number || github.ref }}
       cancel-in-progress: true
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: streetsidesoftware/cspell-action@v7

.github/workflows/cookiecutter.yml

@@ -8,7 +8,7 @@ jobs:
   auto-update-project:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Python
         uses: actions/setup-python@v6
         with:

.github/workflows/dependencies.yml

@@ -8,7 +8,7 @@ jobs:
   auto-update-dependencies:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/actions/python-poetry-env
 
       - name: Install tabulate

.github/workflows/draft_release.yml

@@ -12,7 +12,7 @@ jobs:
   draft-release:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/actions/python-poetry-env
       - name: Update version
         id: updated_version

.github/workflows/release.yml

@@ -8,7 +8,7 @@ jobs:
   build-and-publish:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ./.github/actions/python-poetry-env
       #- name: Publish to pypi
       #  run: |