Bump actions/checkout from 5 to 6

.github/workflows/aspnetcore-sync.yml

@@ -16,14 +16,14 @@ jobs:
     runs-on: windows-latest
     steps:
     - name: Checkout aspnetcore
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         # Test this script using changes in a fork
         repository: 'dotnet/aspnetcore'
         path: aspnetcore
         ref: main
     - name: Checkout runtime
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         # Test this script using changes in a fork
         repository: 'dotnet/runtime'

.github/workflows/bump-chrome-version.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Setup Branch
         run: |
           git config user.name github-actions[bot]

.github/workflows/copilot-setup-steps.yml

@@ -15,7 +15,7 @@ jobs:
     # You can define any steps you want, and they will run before the agent starts.
     # If you do not check out your code, Copilot will do this for you.
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Install Dependencies
         env:

.github/workflows/jit-format.yml

@@ -33,7 +33,7 @@ jobs:
         with:
           dotnet-version: '8.0.x'
       - name: Checkout runtime
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           path: runtime
       - name: Install Python

.github/workflows/locker.yml

@@ -23,7 +23,7 @@ jobs:
     if: ${{ github.repository_owner == 'dotnet' }}
     steps:
       - name: Checkout Actions
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           repository: "microsoft/vscode-github-triage-actions"
           path: ./actions

.github/workflows/markdownlint.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Use Node.js
       uses: actions/setup-node@v6
       with: