Bump actions/checkout from 5 to 6 (#81)

Author: dependabot[bot]

.github/workflows/msbuild.yml

@@ -24,7 +24,7 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Setup .NET
         uses: actions/setup-dotnet@v5

.github/workflows/nuget.yml

@@ -14,7 +14,7 @@ jobs:
 
     steps:
 
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         fetch-depth: 0