Specifies restore source explicitly

Author: Sharkwald

.github/workflows/dotnet.yml

@@ -19,7 +19,7 @@ jobs:
           dotnet-version: '10.0.x'
 
       - name: Restore dependencies
-        run: dotnet restore bottomly.net.slnx
+        run: dotnet restore bottomly.net.slnx -s https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet9/nuget/v3/index.json
 
       - name: Build
         run: dotnet build bottomly.net.slnx --no-restore --configuration Release