Fix example of DORA GraphQL query

What does this MR do and why?

I noticed the given example wasn't working anymore.

assigned to @rymai

added Engineering Productivity docs-only documentation maintenancerefactor labels

added typemaintenance 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.

Documentation review

The following files require a review from a technical writer:

• doc/user/analytics/dora_metrics.md (Link to current live version)

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• Metadata for the *.md files that you've changed. The first few lines of each *.md file identify the stage and group most closely associated with your docs change.
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@axil Could you please review? Thanks!

requested review from @axil

approved this merge request

Hi @axil ,

GitLab Bot has added the Technical Writing label because a Technical Writer has approved or merged this MR.

This message was generated automatically. You're welcome to improve it.

added Technical Writing label

enabled an automatic merge when all merge checks for 23620568 pass

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resolved all threads

merged

mentioned in commit 59d2e843

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