Update Ubuntu Pro upgrade instructions in documentation

Author: genlin

support/azure/virtual-machines/linux/upgrade-canonical-ubuntu-18dot04-lts.md

@@ -20,9 +20,9 @@ Transitioning to the latest operating system, such as [Ubuntu 20.04 LTS](https:/
 > [!NOTE]
 > An in-place upgrade to a new major version (for example, upgrading from Ubuntu 18.04 to 20.04) causes a disconnection between the data plane and the [control plane](/azure/architecture/guide/multitenant/considerations/control-planes) of the VMs. Azure capabilities such as [Auto guest patching](/azure/virtual-machines/automatic-vm-guest-patching), [Auto OS image upgrades](/azure/virtual-machine-scale-sets/virtual-machine-scale-sets-automatic-upgrade), [Hotpatching](/windows-server/get-started/hotpatch?toc=%2Fazure%2Fvirtual-machines%2Ftoc.json), and [Azure Update Manager](/azure/update-manager/overview) won't be available. To use these features, we recommend that you create a new VM by using your preferred operating system instead of performing an in-place upgrade.
 
-## Upgrade to Ubuntu Pro – Extended Security Maintenance until 2028
+## Upgrade to Ubuntu Pro - Extended Security Maintenance until 2028
 
-Ubuntu Pro includes security patching for all Ubuntu packages because of Extended Security Maintenance (ESM) for infrastructure and applications and optional full-time (24 hours a day, seven days a week) telephone and ticket support. Ubuntu Pro 18.04 LTS will remain fully supported until April 2028. New VMs that run Ubuntu Pro can be deployed from the [Azure Marketplace](https://azuremarketplace.microsoft.com/marketplace/apps/canonical.0001-com-ubuntu-pro-bionic?tab=Overview). Obtaining Ubuntu Pro can be accomplished via an in-place conversion to Pay-As-You-Go(PAYG) model via [this guide](https://learn.microsoft.com/azure/virtual-machines/workloads/canonical/ubuntu-pro-in-place-upgrade), or directly purchasing from [Canonical](https://ubuntu.com/pro). For more information about the end of standard support for Ubuntu 18.04 LTS, see [Ubuntu 18.04 LTS (Bionic Beaver) on Azure](https://ubuntu.com/18-04/azure). 
+Ubuntu Pro includes security patching for all Ubuntu packages because of Extended Security Maintenance (ESM) for infrastructure and applications and optional full-time (24 hours a day, seven days a week) telephone and ticket support. Ubuntu Pro 18.04 LTS will remain fully supported until April 2028. New VMs that run Ubuntu Pro can be deployed from the [Azure Marketplace](https://azuremarketplace.microsoft.com/marketplace/apps/canonical.0001-com-ubuntu-pro-bionic?tab=Overview). You can now upgrade your Ubuntu Server (version 16.04 or higher) VM to Ubuntu Pro by an [in-place upgrade](/azure/virtual-machines/workloads/canonical/ubuntu-pro-in-place-upgrade), or directly purchasing from [Canonical](https://ubuntu.com/pro). For more information about the end of standard support for Ubuntu 18.04 LTS, see [Ubuntu 18.04 LTS (Bionic Beaver) on Azure](https://ubuntu.com/18-04/azure). 
 
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