Bump actions/checkout from 5 to 6 (#406)

Author: dependabot[bot]

.github/workflows/benchmarks.yml

@@ -31,7 +31,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - uses: maxim-lobanov/setup-xcode@v1
         if: runner.os == 'macOS'

.github/workflows/dotnet-build.yml

@@ -43,7 +43,7 @@ jobs:
         os: [windows-latest, macos-26]
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Set Latest Xcode Version
         if: runner.os == 'macOS'
@@ -88,7 +88,7 @@ jobs:
         os: [windows-latest, macos-26]
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Set NuGet Version to Tag Number
         if: startsWith(github.ref, 'refs/tags/')

.github/workflows/dotnet-format-daily.yml

@@ -10,7 +10,7 @@ jobs:
         run: dotnet tool install -g dotnet-format
 
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           ref: ${{ github.head_ref }}