Bump actions/checkout from 3 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/building.yml

@@ -27,7 +27,7 @@ jobs:
     name: "[${{ matrix.version }}]"
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Build source distribution
         run: |

.github/workflows/code-bandit.yml

@@ -23,7 +23,7 @@ jobs:
     name: "[ ${{ matrix.target }} ]"
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: "${{ matrix.target }}"
         run: |

.github/workflows/code-black.yml

@@ -23,7 +23,7 @@ jobs:
     name: "[ ${{ matrix.target }} ]"
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: "${{ matrix.target }}"
         run: |

.github/workflows/code-mypy.yml

@@ -23,7 +23,7 @@ jobs:
     name: "[ ${{ matrix.target }} ]"
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: "${{ matrix.target }}"
         run: |

.github/workflows/code-pycodestyle.yml

@@ -23,7 +23,7 @@ jobs:
     name: "[ ${{ matrix.target }} ]"
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: "${{ matrix.target }}"
         run: |

.github/workflows/code-pydocstyle.yml

@@ -23,7 +23,7 @@ jobs:
     name: "[ ${{ matrix.target }} ]"
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: "${{ matrix.target }}"
         run: |

.github/workflows/code-pylint.yml

@@ -23,7 +23,7 @@ jobs:
     name: "[ ${{ matrix.target }} ]"
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: "${{ matrix.target }}"
         run: |

.github/workflows/docker.yml

@@ -15,7 +15,7 @@ jobs:
     name: docker
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set variables
         run: |

.github/workflows/linting.yml

@@ -23,7 +23,7 @@ jobs:
     name: "[ ${{ matrix.target }} ]"
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Lint files
         run: |

.github/workflows/pypi.yml

@@ -15,7 +15,7 @@ jobs:
     name: pypi
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up Python 3.8
         uses: actions/setup-python@v4

.github/workflows/testing.yml

@@ -27,7 +27,7 @@ jobs:
     name: "[${{ matrix.version }}]"
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Build source distribution
         run: |