Update dotnet.yml

Author: Cadabra

.github/workflows/dotnet.yml

@@ -16,10 +16,22 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
-    - name: Setup .NET
-      uses: actions/setup-dotnet@v4
+    - name: Setup .NET 6.0
+      uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 9.0.x
+        dotnet-version: '6.0.x'
+    - name: Setup .NET 7.0
+      uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: '7.0.x'
+    - name: Setup .NET 8.0
+      uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: '8.0.x'
+    - name: Setup .NET 9.0
+      uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: '9.0.x'
     - name: Restore dependencies
       run: dotnet restore
     - name: Build