fix readme launch link
fix readme launch link

AsraFatima/azure-quickstart-templates,AsraFatima/azure-quickstart-templates,AsraFatima/XenApp-Marketplace,alexstoddard/azure-quickstart-templates,alexstoddard/azure-quickstart-templates,alexstoddard/azure-quickstart-templates,AsraFatima/XenApp-Marketplace,AsraFatima/azure-quickstart-templates,AsraFatima/XenApp-Marketplace