Try fixing build

Author: NikolayPianikov

.github/workflows/main.yml

@@ -9,8 +9,13 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
+      
+      - name: Setup dotnet 6
+        uses: actions/setup-dotnet@v3
+        with:
+          dotnet-version: '6.0.x'
 
-      - name: Setup dotnet
+      - name: Setup dotnet 9
         uses: actions/setup-dotnet@v3
         with:
           dotnet-version: '9.0.x'