Amend removal date for license metadata v1

What does this MR do and why?

Amend the removal milestone from 17.0 to 18.0 in order to reduce potential impact to users of GitLab < 16.3.

As discussed on an internal note.

Removal issue: Remove license data V1 format (#440535)

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changed milestone to %16.9

added groupcomposition analysis maintenanceremoval labels

requested review from @rdickenson

assigned to @thiagocsf

added release post itemdeprecation label

added devopssecure sectionsec labels

added Technical Writing label

added typemaintenance label

changed the description

added documentation label

	1 Message
	This merge request adds or changes documentation files. A review from the Technical Writing team before you merge is recommended. Reviews can happen after you merge.

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• doc/update/deprecations.md (Link to current live version)

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approved this merge request

merged

@rdickenson, thanks for approving this merge request.

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added pipeline:mr-approved label

@thiagocsf I've reviewed, approved, and merged this MR.

mentioned in commit b82fdc3e

added workflowstaging-canary label

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