Update actions/checkout action to v6 (#9323)

Author: radarhere

.github/workflows/docs.yml

@@ -32,7 +32,7 @@ jobs:
     name: Docs
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         persist-credentials: false
 

.github/workflows/lint.yml

@@ -20,7 +20,7 @@ jobs:
     name: Lint
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         persist-credentials: false
 

.github/workflows/test-docker.yml

@@ -68,7 +68,7 @@ jobs:
     name: ${{ matrix.docker }}
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         persist-credentials: false
 

.github/workflows/test-mingw.yml

@@ -45,7 +45,7 @@ jobs:
 
     steps:
       - name: Checkout Pillow
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           persist-credentials: false
 

.github/workflows/test-valgrind-memory.yml

@@ -41,7 +41,7 @@ jobs:
     name: ${{ matrix.docker }}
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         persist-credentials: false
 

.github/workflows/test-valgrind.yml

@@ -39,7 +39,7 @@ jobs:
     name: ${{ matrix.docker }}
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         persist-credentials: false
 

.github/workflows/test-windows.yml

@@ -47,19 +47,19 @@ jobs:
 
     steps:
     - name: Checkout Pillow
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         persist-credentials: false
 
     - name: Checkout cached dependencies
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         persist-credentials: false
         repository: python-pillow/pillow-depends
         path: winbuild\depends
 
     - name: Checkout extra test images
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         persist-credentials: false
         repository: python-pillow/test-images

.github/workflows/test.yml

@@ -65,7 +65,7 @@ jobs:
     name: ${{ matrix.os }} Python ${{ matrix.python-version }}
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         persist-credentials: false
 

.github/workflows/wheels.yml

@@ -107,7 +107,7 @@ jobs:
             os: macos-15-intel
             cibw_arch: x86_64_iphonesimulator
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
           submodules: true
@@ -154,12 +154,12 @@ jobs:
           - cibw_arch: ARM64
             os: windows-11-arm
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
 
       - name: Checkout extra test images
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           persist-credentials: false
           repository: python-pillow/test-images
@@ -235,7 +235,7 @@ jobs:
     if: github.event_name != 'schedule' || github.repository_owner == 'python-pillow'
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         persist-credentials: false