Update dependencies from https://github.com/dotnet/arcade build 20200630.3 (#7949)

Microsoft.DotNet.Arcade.Sdk
 From Version 5.0.0-beta.20316.1 -> To Version 5.0.0-beta.20330.3

Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>

eng/common/internal-feed-operations.sh

@@ -62,6 +62,7 @@ function SetupCredProvider {
   endpoints+=']'
 
   if [ ${#endpoints} -gt 2 ]; then 
+      # [SuppressMessage("Microsoft.Security", "CS002:SecretInNextLine", Justification="Endpoint code example with no real credentials.")]
       # Create the JSON object. It should look like '{"endpointCredentials": [{"endpoint":"http://example.index.json", "username":"optional", "password":"accesstoken"}]}'
       local endpointCredentials="{\"endpointCredentials\": "$endpoints"}"