Bump actions/checkout from 5 to 6 (#3669)

Author: dependabot[bot]

.github/workflows/build.yml

@@ -48,7 +48,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup .NET Core SDK
         uses: actions/setup-dotnet@v5
@@ -132,7 +132,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup .NET Core SDK
         uses: actions/setup-dotnet@v5
@@ -164,7 +164,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup .NET Core SDK
         uses: actions/setup-dotnet@v5