Added a link to GH repo where customers can leverage ADE's Extensibil…

[varshagangu9]

…ity model with Terraform

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Learn Build status updates of commit 0705cb2:

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[learn-build-service-prod]

Learn Build status updates of commit 42bda05:

✅ Validation status: passed

File	Status	Preview URL	Details
articles/deployment-environments/how-to-configure-extensibility-terraform-container-image.md	✅Succeeded

For more details, please refer to the build report.

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[varshagangu9]

#sign-off

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