build(deps): bump actions/checkout from 5 to 6 (#10916)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/benchmarks.yaml

@@ -18,7 +18,7 @@ jobs:
         with:
             python-version: "3.14"
 
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           ref: ${{ github.event.pull_request.base.sha }}
           fetch-depth: 0
@@ -32,7 +32,7 @@ jobs:
       - name: run benchmarks on base branch
         run: pytest --benchmark-autosave dvc/testing/benchmarks/ -k 'test_init or test_help'
 
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           clean: false

.github/workflows/build.yaml

@@ -19,7 +19,7 @@ jobs:
     name: Build & Verify package
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         fetch-depth: 0
 

.github/workflows/codeql.yml

@@ -28,7 +28,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     - name: Initialize CodeQL
       uses: github/codeql-action/init@v4

.github/workflows/plugin_tests.yaml

@@ -23,11 +23,11 @@ jobs:
         plugin: ["dvc-s3"]
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         path: dvc
 
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         repository: iterative/${{ matrix.plugin }}
         ref: main

.github/workflows/tests.yaml

@@ -26,7 +26,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         fetch-depth: 0
     - name: Set up Python
@@ -130,7 +130,7 @@ jobs:
           pyv: "3.14"
           pytestargs: "--splitting-algorithm=least_duration --splits 4 --group 4"
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         fetch-depth: 0
     - name: Set up Python