refactor: Bump actions/checkout from 3 to 6 (#1058)

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -36,7 +36,7 @@ jobs:
     name: Test ${{ matrix.name }}
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Configure git for line endings (Windows)
         if: matrix.os == 'windows-latest'
         run: |
@@ -101,7 +101,7 @@ jobs:
     name: Test ${{ matrix.name }}
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Setup flutter (beta)
         if: ${{ matrix.sdk == 'beta' }}
         uses: subosito/flutter-action@v2
@@ -147,7 +147,7 @@ jobs:
     name: Auto-Release Dry Run
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0 # Required for semantic-release to analyze commit history
       - name: Setup Node.js

.github/workflows/dependency-audit.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup Dart
         uses: dart-lang/setup-dart@v1
@@ -48,7 +48,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup Flutter
         uses: subosito/flutter-action@v2

.github/workflows/release-automated.yml

@@ -26,7 +26,7 @@ jobs:
       pull-requests: write
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
           persist-credentials: false

.github/workflows/release-manual-docs.yml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v6
         with:
           ref: ${{ github.event.inputs.tag }}
       - name: Setup dart

.github/workflows/release-publish.yml

@@ -15,7 +15,7 @@ jobs:
       id-token: write
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           ref: ${{ github.ref_name }}
       - name: Setup dart
@@ -43,7 +43,7 @@ jobs:
       id-token: write
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           ref: ${{ github.ref_name }}
       - name: Setup dart
@@ -78,7 +78,7 @@ jobs:
     timeout-minutes: 15
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           ref: ${{ github.ref_name }}
       - name: Setup dart
@@ -101,7 +101,7 @@ jobs:
     timeout-minutes: 15
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           ref: ${{ github.ref_name }}
       - name: Setup dart