Update actions 'checkout' and 'setup-dotnet' to v5 (#11)

Author: axunonb

.github/workflows/dotnet.yml

@@ -26,9 +26,9 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
     - name: Setup .NET
-      uses: actions/setup-dotnet@v4
+      uses: actions/setup-dotnet@v5
       with:
         dotnet-version: ${{ matrix.dotnet-version }}
     - name: Restore dependencies