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/ci_license_check.yml

@@ -23,7 +23,7 @@ jobs:
     if: github.repository_owner == 'seqan' || github.event_name == 'workflow_dispatch'
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: REUSE Compliance Check
         uses: fsfe/reuse-action@v6

.github/workflows/ci_linux.yml

@@ -41,7 +41,7 @@ jobs:
       image: ghcr.io/seqan/${{ matrix.compiler }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Configure tests
         run: |

.github/workflows/ci_macos.yml

@@ -39,7 +39,7 @@ jobs:
             cpp: 26
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup compiler
         uses: seqan/actions/setup-compiler@main

.github/workflows/ci_readme.yml

@@ -29,7 +29,7 @@ jobs:
     if: github.repository_owner == 'seqan' || github.event_name == 'workflow_dispatch'
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           token: ${{ secrets.SEQAN_ACTIONS_PAT }}
 

.github/workflows/ci_win.yml

@@ -35,7 +35,7 @@ jobs:
         uses: ilammy/msvc-dev-cmd@v1
 
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Configure tests
         run: |