Bump actions/checkout from 5 to 6 in the github-actions group

Bumps the github-actions group with 1 update: [actions/checkout](https://github.com/actions/checkout).


Updates `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
  dependency-group: github-actions
...

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

Author: dependabot[bot]

.github/workflows/python-package.yml

@@ -20,7 +20,7 @@ jobs:
   ruff:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Install Ruff
         run: pip install ruff
       - name: Ruff Check
@@ -31,7 +31,7 @@ jobs:
   mypy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Checkout submodules
         run: git submodule update --init --recursive --depth 1
       - name: Install typing dependencies
@@ -50,7 +50,7 @@ jobs:
           install-linux-dependencies: true
           build-type: "Debug"
           version: ${{ env.sdl-version }}
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: ${{ env.git-depth }}
       - name: Checkout submodules
@@ -76,7 +76,7 @@ jobs:
         sdl-version: ["3.2.16"]
       fail-fast: true
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: ${{ env.git-depth }}
       - name: Checkout submodules
@@ -106,7 +106,7 @@ jobs:
       fail-fast: false
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: ${{ env.git-depth }}
       - name: Checkout submodules
@@ -171,7 +171,7 @@ jobs:
           install-linux-dependencies: true
           build-type: "Debug"
           version: ${{ env.sdl-version }}
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: ${{ env.git-depth }}
       - name: Checkout submodules
@@ -195,7 +195,7 @@ jobs:
       matrix:
         os: ["ubuntu-latest"] # "windows-latest" disabled due to free-threaded build issues
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: ${{ env.git-depth }}
       - name: Checkout submodules
@@ -227,7 +227,7 @@ jobs:
     env:
       BUILD_DESC: ""
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: ${{ env.git-depth }}
       - name: Checkout submodules
@@ -282,7 +282,7 @@ jobs:
     env:
       PYTHON_DESC: ""
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: ${{ env.git-depth }}
       - name: Checkout submodules
@@ -322,7 +322,7 @@ jobs:
     needs: [ruff, mypy, sdist]
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: ${{ env.git-depth }}
       - name: Checkout submodules

.github/workflows/release-on-tag.yml

@@ -13,7 +13,7 @@ jobs:
       contents: write
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Generate body
         run: |
           scripts/get_release_description.py | tee release_body.md