chore(ci): Bump actions/checkout from 4 to 6

.github/workflows/ci.yml

@@ -22,7 +22,7 @@ jobs:
       matrix:
         node-version: [18, 20, 22]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Setup Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v4
@@ -71,7 +71,7 @@ jobs:
       matrix:
         python-version: ['3.11', '3.12']  # Matches pyproject.toml requires-python = ">=3.11"
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Setup Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5
@@ -120,7 +120,7 @@ jobs:
       security-events: write
       contents: read
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Run Trivy vulnerability scanner
         uses: aquasecurity/trivy-action@master
@@ -142,7 +142,7 @@ jobs:
     runs-on: ubuntu-latest
     if: github.event_name == 'pull_request'
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Dependency Review
         uses: actions/dependency-review-action@v4
         with:
@@ -156,7 +156,7 @@ jobs:
     name: Pickle Security Scan
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Setup Python
         uses: actions/setup-python@v5
@@ -190,7 +190,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: [typescript, python]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Setup Node.js
         uses: actions/setup-node@v4
@@ -236,7 +236,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Setup Node.js
         uses: actions/setup-node@v4

.github/workflows/release.yml

@@ -13,7 +13,7 @@ jobs:
     name: Build and Verify
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Setup Node.js
         uses: actions/setup-node@v4
@@ -59,7 +59,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: build
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Download artifacts
         uses: actions/download-artifact@v4