Add edit to grow section of Column API docs

[chrisdel101]

• Very small thing, but I thought it could be worth add a small text addition to docs noting that grow doesn't work with button
• As per src\DataTable\Cell.ts. No changes made to code, just this edit to the docs based on what this file has.
• Not a huge deal if not, but it took some time for me before I figured out why grow didn't work, and it was because I had the button tag there erroneously.

Looks like:

Related to issue #1023

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[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.