Prefer dotnet6 changes

Author: TanayParikh

eng/helix/content/runtests.sh

@@ -86,10 +86,10 @@ fi
 sync
 
 exit_code=0
-echo "Restore: $DOTNET_ROOT/dotnet restore RunTests/RunTests.csproj --source https://api.nuget.org/v3/index.json --ignore-failed-sources..."
-$DOTNET_ROOT/dotnet restore RunTests/RunTests.csproj --source https://api.nuget.org/v3/index.json --ignore-failed-sources
-echo "Running tests: $DOTNET_ROOT/dotnet run --project RunTests/RunTests.csproj -- --target $1 --runtime $4 --queue $5 --arch $6 --quarantined $7 --ef $8 --aspnetruntime $9 --aspnetref ${10} --helixTimeout ${11}"
-$DOTNET_ROOT/dotnet run --project RunTests/RunTests.csproj -- --target $1 --runtime $4 --queue $5 --arch $6 --quarantined $7 --ef $8 --aspnetruntime $9 --aspnetref ${10} --helixTimeout ${11}
+echo "Restore: $DOTNET_ROOT/dotnet restore RunTests/RunTests.csproj --source https://api.nuget.org/v3/index.json --source https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet6/nuget/v3/index.json --source https://api.nuget.org/v3/index.json --ignore-failed-sources"
+$DOTNET_ROOT/dotnet restore RunTests/RunTests.csproj --source https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet6/nuget/v3/index.json --source https://api.nuget.org/v3/index.json --ignore-failed-sources
+echo "Running tests: $DOTNET_ROOT/dotnet run --project RunTests/RunTests.csproj -- --source https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet6/nuget/v3/index.json --target $1 --runtime $4 --queue $5 --arch $6 --quarantined $7 --ef $8 --aspnetruntime $9 --aspnetref ${10} --helixTimeout ${11}"
+$DOTNET_ROOT/dotnet run --project RunTests/RunTests.csproj -- --source https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet6/nuget/v3/index.json --target $1 --runtime $4 --queue $5 --arch $6 --quarantined $7 --ef $8 --aspnetruntime $9 --aspnetref ${10} --helixTimeout ${11}
 exit_code=$?
 echo "Finished tests...exit_code=$exit_code"