Update CHANGELOG-EE.md for 13.12.0-ee

[ci skip]

ee/changelogs/unreleased/292253-cablett-epic-remove-emoji.yml

----
-title: Track users removing epic emoji via usage ping
-merge_request: 60989
-author:
-type: other

ee/changelogs/unreleased/292253-epic-task-epic-descr.yml

----
-title: Track checking/unchecking tasks on epics
-merge_request: 60846
-author:
-type: added

ee/changelogs/unreleased/292253-track-epic-set-parent.yml

----
-title: Track epic parent changes via usage ping
-merge_request: 60079
-author:
-type: other

ee/changelogs/unreleased/292268-destroy-iteration-mutation.yml

----
-title: Add support to destroy iterations in GraphQL
-merge_request: 60655
-author:
-type: added

ee/changelogs/unreleased/293843-expand-filtering-functionality-of-vulnerabilities-group-scanners.yml

----
-title: Add scannerId field to group vulnerabilities query
-merge_request: 58156
-author:
-type: changed

ee/changelogs/unreleased/293843-expand-filtering-functionality-of-vulnerabilities-project-scanners.yml

----
-title: Add scannerId field to project vulnerabilities query
-merge_request: 58157
-author:
-type: changed

ee/changelogs/unreleased/294210-gitlab-elasticsearch-reindexing-allow-slice-tuning-in-ui.yml

----
-title: Customize settings for Advanced Search reindex operations
-merge_request: 60730
-author:
-type: changed

ee/changelogs/unreleased/296520_improve_merge_reports_service.yml

----
-title: Make the MergeReportsService more reliable
-merge_request: 59682
-author:
-type: fixed

ee/changelogs/unreleased/296713-threat-alert-assignee.yml

----
-title: Add assignee column to threat alert list
-merge_request: 60340
-author:
-type: added

ee/changelogs/unreleased/296715-add-incident-column.yml

----
-title: Create incident column for threat alerts
-merge_request: 59821
-author:
-type: added

ee/changelogs/unreleased/296882-ui-for-es-shard-replica-settings.yml

----
-title: 'Advanced Search: allow standalone shard/replica settings'
-merge_request: 57567
-author:
-type: changed

ee/changelogs/unreleased/296884-disable-unpausing-indexing-if-a-reindex-is-in-progress.yml

----
-title: Disable pause indexing checkbox if a reindex is in progress
-merge_request: 60953
-author:
-type: changed

ee/changelogs/unreleased/297472-geo-secondaries-are-orphaning-artifact-files.yml

----
-title: 'Resolve Geo: Secondaries are orphaning artifact files'
-merge_request: 60644
-author:
-type: fixed

ee/changelogs/unreleased/297646-es-migration-to-delete-notes-from-combined-index.yml

----
-title: Delete Notes from original ES index
-merge_request: 61399
-author:
-type: changed

ee/changelogs/unreleased/297646-fixes-for-es-migration-to-delete-notes-from-combined-index.yml

----
-title: Change notes removal migration to use ES tasks
-merge_request: 61798
-author:
-type: changed

ee/changelogs/unreleased/298918-add-fuzzing-scan-details.yml

----
-title: Add Coverage and API Fuzzing vuln count summaries
-merge_request: 61827
-author:
-type: added

ee/changelogs/unreleased/299238-fix-minor-ux-issues-with-group-by-within-iteration-report.yml

----
-title: Fix minor UX issues with "group by" within iteration report
-merge_request: 59522
-author:
-type: fixed

ee/changelogs/unreleased/299295-remove-old-scanner-filter.yml

----
-title: Remove old scanner filter and only use new filter on vulnerability report page
-merge_request: 61959
-author:
-type: added

ee/changelogs/unreleased/300115-more-filters-issue-resolver-boards.yml

----
-title: Support board issue filtering by weight and iteration_id in GraphQL
-merge_request: 59703
-author:
-type: added

ee/changelogs/unreleased/300992-auditor-access-security-center.yml

----
-title: "“Security Center project selector returns projects and gives the ability to
-  add project for Auditor user”"
-merge_request: 58841
-author:
-type: added