Update setup-dotnet

Author: christophergunn

.github/workflows/dotnet.yml

@@ -14,7 +14,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Setup .NET
-      uses: actions/setup-dotnet@v1
+      uses: actions/setup-dotnet@v4
       with:
         dotnet-version: 8.0.x
     - name: Restore dependencies