Update 'Cloud Volumes Service' to 'Google Cloud NetApp Volumes'

[lexmart97]

Page URL

https://docs.netapp.com/us-en/netapp-solutions/xcp/xcp-bp-migration-workflow-overview.html

Page title

Migration workflow

Summary

Hi, I'd like to request updates to the mention of 'Cloud Volumes Service' to 'Google Cloud NetApp Volumes'

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