Update Prometheus Merge Request widget documentation

This MR updates the documentation for the merge request changes to show the performance data. These changes are necessary updates to reflect the changes in 9.2, and add a screenshot.

Closes #32583 (closed)

unmarked as a Work In Progress

changed title from WIP: Resolve "Update Prometheus Merge Request widget documentation" to Update Prometheus Merge Request widget documentation

changed the description

assigned to @axil

added 1 commit

• 21ed05a5 - Update prometheus documentation

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@axil can you review?

restored source branch 32583-update-prometheus-merge-request-widget-documentation

changed milestone to %9.2

approved this merge request

merged

mentioned in commit 3ad82355

Picked into 9-2-stable, will go into 9.2.0-rc7.

mentioned in commit d0b92f92