Update CHANGELOG-EE.md for 13.9.0-ee

[ci skip]

ee/changelogs/unreleased/bump-gei-to-2-9-0.yml

----
-title: Change the GitLab Elasticsearch Indexer version to 2.9.0
-merge_request: 53764
-author:
-type: added

ee/changelogs/unreleased/change_from_endpoint_format_to_align_policy_with_behaviour.yml

----
-title: Revert text back to Allow instead of Deny. Fixes fromEndpoints/toEndpoints
-  format to keep it aligned with the allow all logic. The previous code was causing
-  a allowing none while it should be allowing all.
-merge_request: 53940
-author:
-type: fixed

ee/changelogs/unreleased/customers-2499-mlunoe-update-renew-subscription-link-in-banner.yml

----
-title: Update renew/upgrade banner with actionable links
-merge_request: 51705
-author:
-type: added

ee/changelogs/unreleased/dedup_semgrep.yml

----
-title: Dedupe vulnerability_findings for bandit and semgrep
-merge_request: 54181
-author:
-type: added

ee/changelogs/unreleased/display-iteration-issues-in-subgroups.yml

----
-title: Scope iteration report to subgroups
-merge_request: 52926
-author:
-type: fixed

ee/changelogs/unreleased/djadmin-dast-redirect-profiles.yml

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-title: Redirect user to previous page after DAST profiles creation
-merge_request: 51482
-author:
-type: changed

ee/changelogs/unreleased/djadmin-dast-selector-ui.yml

----
-title: Improve UX for DAST Profiles selector
-merge_request: 51957
-author:
-type: changed

ee/changelogs/unreleased/djadmin-ods-cancel-button.yml

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-title: Add cancel button to On-demand scans form
-merge_request: 54050
-author:
-type: added

ee/changelogs/unreleased/djadmin-remove-validation-badges.yml

----
-title: Remove badges design from DAST validation statuses
-merge_request: 52301
-author:
-type: changed

ee/changelogs/unreleased/djadmin-revoke-validation.yml

----
-title: Add support for revoking DAST site validations
-merge_request: 53134
-author:
-type: added

ee/changelogs/unreleased/docs-ui-text-settings-push-rules.yml

----
-title: Review UI text - repo push rules settings
-merge_request: 52797
-author:
-type: other

ee/changelogs/unreleased/export-selected-fields.yml

----
-title: Export only selected fields in requirements
-merge_request: 53707
-author:
-type: added

ee/changelogs/unreleased/fix-file-tmpls-return-same-content-for-different-tmpls.yml

----
-title: Fix file templates return same content for templates with same name but from
-  different projects
-merge_request: 52332
-author:
-type: fixed

ee/changelogs/unreleased/fix_blank_alert_from_vuln_issue.yml

----
-title: Fix blank alert field when creating an issue from a vulnerability
-merge_request: 53656
-author:
-type: fixed

ee/changelogs/unreleased/fix_duplicit_epics_on_roadmap.yml

----
-title: Fix duplicit epics on roadmap page when filtering by milestone
-merge_request: 52201
-author:
-type: fixed

ee/changelogs/unreleased/fixed-iteration-dropdown-ui.yml

----
-title: Fixed iteration dropdown UI
-merge_request: 52987
-author:
-type: fixed

ee/changelogs/unreleased/georgekoltsov-add-epic-award-emojis-graphql.yml

----
-title: Add award emoji to epics in GraphQL
-merge_request: 52922
-author:
-type: added

ee/changelogs/unreleased/georgekoltsov-add-events-to-epics-graphql.yml

----
-title: Add Event type to GraphQL and events to epics
-merge_request: 53152
-author:
-type: changed

ee/changelogs/unreleased/georgekoltsov-bulk-import-epic-parent-child-association.yml

----
-title: Preserve Epic parent-child association when importing using Bulk Import
-merge_request: 52662
-author:
-type: changed

ee/changelogs/unreleased/georgekoltsov-graphql-extractor-yield-one-record.yml

----
-title: Process one record at a time in Bulk Import pipelines
-merge_request: 52330
-author:
-type: changed