Update tutorial-custom-images.md and change --managed-image to --virtual-machine parameter.

[Dxaz]

--managed-image need to get replaced with --virtual-machine as it takes a Virtual Machine ID given in the steps above while --managed-image requires a manged image resource ID.

Using managed-image parameter here will throw an error:
The gallery image version source id: '/subscriptions/0000-0000-0000-0000/resourceGroups/myGalleryRG/providers/Microsoft.Compute/virtualMachines/myVM' must be specified in 'galleryImageVersion.properties.storageProfile.source.virtualMachineId'.
Target: galleryImageVersion.properties.storageProfile.source

az sig image-version create states this in the documentation:
https://learn.microsoft.com/en-us/cli/azure/sig/image-version?view=azure-cli-latest#az-sig-image-version-create-optional-parameters

As well as the examples:

Add a new image version with encryption using a disk encryption set. Encryption is applied to each disk that is a part of the image version.

Azure CLI

Copy

Open Cloud Shell
az sig image-version create --resource-group MyResourceGroup
--gallery-name MyGallery --gallery-image-definition MyImage
--gallery-image-version 1.0.0
--virtual-machine /subscriptions/00000000-0000-0000-0000-00000000xxxx/resourceGroups/imageGroups/providers/Microsoft.Compute/virtualMachines/MyVM
--target-regions westus=2=standard eastus
--target-region-encryption WestUSDiskEncryptionSet1,0,WestUSDiskEncryptionSet2
EastUSDiskEncryptionSet1,0,EastUSDiskEncryptionSet2

[prmerger-automator]

@Dxaz : Thanks for your contribution! The author(s) have been notified to review your proposed change.

[learn-build-service-prod]

Learn Build status updates of commit ffd73c8:

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articles/virtual-machines/linux/tutorial-custom-images.md	✅Succeeded

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[Jak-MS]

@mattmcinnes
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

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[Dxaz]

#sign-off

[prmerger-automator]

Invalid command: '#sign-off'. Only the assigned author of one or more file in this PR can sign off. @mattmcinnes

[Jak-MS]

@mattmcinnes - nudge. this has been waiting a while... can you take a look ? thanks.

[Dxaz]

Hey @mattmcinnes can I get you take a quick look, it'll take 10 minutes of time to look and test to verify the change.