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

.github/workflows/nitpicker.yaml

@@ -8,7 +8,7 @@ jobs:
     name: tag codeowners
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: nitpicker
       uses: ethanis/nitpicker@v1.7
       with:

.github/workflows/review.yml

@@ -8,7 +8,7 @@ jobs:
     name: Commits review
     runs-on: ubuntu-24.04
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         ref: ${{ github.event.pull_request.head.sha }}
         fetch-depth: 0

.github/workflows/test.yml

@@ -13,7 +13,7 @@ jobs:
         # gcc-versions are used to test up to 5 years old
         gcc-version: [9, 10, 11, 12, 13, 14]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: 'Add ubuntu repositories'
         run: .github/configure_apt.sh
       - name: 'Install building dependencies'
@@ -48,7 +48,7 @@ jobs:
     name: Compilation test with clang
     runs-on: ubuntu-24.04
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: 'Add ubuntu repositories'
       run: .github/configure_apt.sh
     - name: 'Install building dependencies'
@@ -67,7 +67,7 @@ jobs:
         python-version: ["3.9"]
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: 'Add ubuntu repositories'
         run: .github/configure_apt.sh
       - name: 'Install building dependencies'

.github/workflows/yapf_check.yaml

@@ -6,7 +6,7 @@ jobs:
     name: Formatting Check
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: run YAPF to test if python code is correctly formatted
       uses: AlexanderMelde/yapf-action@master
       with: