Bump actions/checkout from 6.0.2 to 6.0.3

.github/workflows/build.yml

@@ -19,7 +19,7 @@ jobs:
         python: ['3.9', '3.10', '3.11', '3.12', '3.13']
         os: ['ubuntu-latest', 'windows-latest', 'macos-latest']
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
       - uses: ./.github/actions/ci-setup
         with:
           python-version: ${{ matrix.python }}
@@ -34,7 +34,7 @@ jobs:
     needs: setup
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
       - uses: ./.github/actions/ci-setup
 
       - name: Run unit tests
@@ -56,7 +56,7 @@ jobs:
     needs: setup
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
       - uses: ./.github/actions/ci-setup
 
       - name: Run coverage
@@ -78,7 +78,7 @@ jobs:
     needs: setup
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
       - uses: ./.github/actions/ci-setup
 
       - name: Run lint
@@ -100,7 +100,7 @@ jobs:
     needs: setup
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
       - uses: ./.github/actions/ci-setup
 
       - name: Run pep8 codestyle check
@@ -122,7 +122,7 @@ jobs:
     needs: setup
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
       - uses: ./.github/actions/ci-setup
         with:
           extras: docs

.github/workflows/documentation.yml

@@ -11,7 +11,7 @@ jobs:
   build-docs:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with:
           ref: main
           fetch-depth: 0

.github/workflows/release.yml

@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+    - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
     - uses: ./.github/actions/ci-setup
 
     - name: "Upgrade dependencies"

.github/workflows/weekly.yml

@@ -17,7 +17,7 @@ jobs:
     permissions:
       issues: write
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
 
       - name: Check for new Python versions
         env: