chore(ci)(deps): bump actions/checkout from 5 to 6 (#801)

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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/CI-models.yml

@@ -25,7 +25,7 @@ jobs:
         python-version: [ "3.13"  ]
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v6
         with:
@@ -47,7 +47,7 @@ jobs:
         python-version: [ "3.13" ]
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v6
         with:
@@ -69,7 +69,7 @@ jobs:
         python-version: [ "3.13"  ]
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v6
         with:

.github/workflows/CI.yml

@@ -35,7 +35,7 @@ jobs:
         uses: styfle/cancel-workflow-action@0.12.1
         with:
           access_token: ${{ github.token }}
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Print concurrency group
         run: echo '${{ github.workflow }}-${{ github.ref }}'
       - name: Set up Python ${{ matrix.python-version }}
@@ -64,7 +64,7 @@ jobs:
         uses: styfle/cancel-workflow-action@0.12.1
         with:
           access_token: ${{ github.token }}
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Print concurrency group
         run: echo '${{ github.workflow }}-${{ github.ref }}'
       - name: Set up Python ${{ matrix.python-version }}
@@ -93,7 +93,7 @@ jobs:
         uses: styfle/cancel-workflow-action@0.12.1
         with:
           access_token: ${{ github.token }}
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Print concurrency group
         run: echo '${{ github.workflow }}-${{ github.ref }}'
       - name: Set up Python ${{ matrix.python-version }}

.github/workflows/Publish.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0