updating appveyor.yml with max_jobs:1
updating appveyor.yml with max_jobs:1

Azure/azure-webjobs-sdk-script,Azure/azure-webjobs-sdk-script,Azure/azure-webjobs-sdk-script,fabiocav/azure-webjobs-sdk-script,fabiocav/azure-webjobs-sdk-script,fabiocav/azure-webjobs-sdk-script,Azure/azure-webjobs-sdk-script,fabiocav/azure-webjobs-sdk-script