Update how-to-manage-compute-instance.md

[bhgtankita]

Updated document with below proposed changes:

Clarification about resource locations in the context of a workspace's resource group:
When resources such as Network Security Groups (NSGs), Public IPs, and Load Balancers are not in the same resource group as the Azure Machine Learning workspace, it's important to specify this in the documentation.
For example, if the VNET (Virtual Network) is located in a separate resource group for management purposes, customers should understand that these resources will be created in the same resource group as the VNET, not necessarily the workspace's resource group.

The documentation should explicitly note this distinction to avoid customers assuming that all resources are created in the workspace's resource group.
Expand resource lock behavior documentation for Compute Instances:
Resource locks can affect creation of a Compute Instance, not just resizing.
The documentation should include this information and explicitly state that locks can prevent both the creation and resizing of Compute Instances.
This clarification will help ensure customers are aware of potential issues caused by resource locks during either operation.

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[v-dirichards]

@sdgilley

Can you review the proposed changes?

Important: When the changes are ready for publication, adding a #sign-off comment is the best way to signal that the PR is ready for the review team to merge.

#label:"aq-pr-triaged"
@MicrosoftDocs/public-repo-pr-review-team