Bump actions/checkout from 4 to 5 (#183)

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 5.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/coverage.yml

@@ -9,7 +9,7 @@ jobs:
         python-version: ["3.12"]
         os: [ubuntu-latest]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v6
         with:

.github/workflows/formatting.yml

@@ -13,7 +13,7 @@ jobs:
         os: [ubuntu-latest]
         tool: ["black", "isort"]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v6
         with:

.github/workflows/main_fristenkalender.yml

@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Setup Python version
         uses: actions/setup-python@v6

.github/workflows/no_byte_order_mark.yml

@@ -11,6 +11,6 @@ jobs:
   bom-check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: arma-actions/bom-check@v1
         name: Check for BOM

.github/workflows/pythonlint.yml

@@ -14,7 +14,7 @@ jobs:
         os: [ubuntu-latest]
         linter-env: ["linting", "type_check", "spell_check"]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v6
         with:

.github/workflows/unittests.yml

@@ -12,7 +12,7 @@ jobs:
         python-version: ["3.11", "3.12"]
         os: [ubuntu-latest]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v6
         with: