Update actions/setup-dotnet action to v4

Author: renovate[bot]

.github/workflows/build.yml

@@ -70,7 +70,7 @@ jobs:
     - name: Checkout
       uses: actions/checkout@v4
     - name: Setup dotnet SDK
-      uses: actions/setup-dotnet@v3
+      uses: actions/setup-dotnet@v4
       with:
         dotnet-version: |
           6.0.x