docs: add terraform note

[Rohan5commit]

Added helpful tip.

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[hashicorp-cla-app]

Thank you for your submission! We require that all contributors sign our Contributor License Agreement ("CLA") before we can accept the contribution. Read and sign the agreement

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[github-actions]

Changelog Warning

Currently this PR would target a v1.16 release. Please add a changelog entry for in the .changes/v1.16 folder, or discuss which release you'd like to target with your reviewer. If you believe this change does not need a changelog entry, please add the 'no-changelog-needed' label.