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

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/CPU-train-model.yml

@@ -10,7 +10,7 @@ jobs:
         environment: Repository
 
         steps:
-            -   uses: actions/checkout@v5
+            -   uses: actions/checkout@v6
 
             -   uses: actions/setup-node@v6
                 with:

.github/workflows/GPU-train-model.yml

@@ -10,7 +10,7 @@ jobs:
         environment: Repository
 
         steps:
-            -   uses: actions/checkout@v5
+            -   uses: actions/checkout@v6
 
             -   uses: actions/setup-python@v6
                 with:

.github/workflows/dependency-review.yml

@@ -28,7 +28,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: 'Checkout repository'
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: 'Dependency Review'
         uses: actions/dependency-review-action@v4
         # Commonly enabled options, see https://github.com/actions/dependency-review-action#configuration-options for all available options.

.github/workflows/mypy.yml

@@ -15,7 +15,7 @@ jobs:
                 python-version: [ '3.10' ]
 
         steps:
-            -   uses: actions/checkout@v5
+            -   uses: actions/checkout@v6
             -   name: Set up Python ${{ matrix.python-version }}
                 uses: actions/setup-python@v6
                 with:

.github/workflows/ruff.yml

@@ -10,14 +10,14 @@ jobs:
     ruff-linting:
         runs-on: ubuntu-latest
         steps:
-            -   uses: actions/checkout@v5
+            -   uses: actions/checkout@v6
             -   uses: astral-sh/ruff-action@v3
                 with:
                     version-file: "./unix-requirements.txt"
     ruff-formatting:
         runs-on: ubuntu-latest
         steps:
-            -   uses: actions/checkout@v5
+            -   uses: actions/checkout@v6
             -   uses: astral-sh/ruff-action@v3
                 with:
                     version-file: "./unix-requirements.txt"

.github/workflows/test-and-coverage.yml

@@ -20,7 +20,7 @@ jobs:
                 python-version: [ '3.10' ]
 
         steps:
-            -   uses: actions/checkout@v5
+            -   uses: actions/checkout@v6
             -   name: Set up Python ${{ matrix.python-version }}
                 uses: actions/setup-python@v6
                 with:
@@ -40,7 +40,7 @@ jobs:
                 group: 'pages'
                 cancel-in-progress: true
         steps:
-            -   uses: actions/checkout@v5
+            -   uses: actions/checkout@v6
             -   uses: actions/configure-pages@v5
             -   uses: actions/setup-python@v6
                 with: