Update CHANGELOG.md for 12.8.0

[ci skip]

changelogs/unreleased/dast-deploy-bump-0-9-1.yml

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-title: Bump DAST deploy auto-deploy-image to 0.9.1
-merge_request: 24232
-author:
-type: other

changelogs/unreleased/dblessing_disable_enforced_sso_plan_expires.yml

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-title: When a namespace GitLab Subscription expires, disable SSO enforcement
-merge_request: 21135
-author:
-type: fixed

changelogs/unreleased/defect-safari-line-numbers-height.yml

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-title: Fix code line and line number alignment in Safari
-merge_request: 24820
-author:
-type: fixed

changelogs/unreleased/display-ops-ff-iid.yml

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-title: Display operations feature flag internal ids
-merge_request: 23914
-author:
-type: added

changelogs/unreleased/dmishunov-update-clipboard-icon.yml

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-title: Updated icon for copy-to-clipboard button
-merge_request: 24146
-author:
-type: other

changelogs/unreleased/do-not-create-pre-post-pipeline.yml

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-title: Require other stages than .pre and .post
-merge_request: 23629
-author:
-type: fixed

changelogs/unreleased/docs-fix_default_branches_link.yml

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-title: Fixed default-branch link under Pipeline Subscription settings
-merge_request: 24834
-author: James Johnson
-type: fixed

changelogs/unreleased/docs-job-activity-limit.yml

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-title: Document CI job activity limit for pipeline creation
-merge_request: 23246
-author:
-type: added

changelogs/unreleased/dz-move-project-routes.yml

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-title: Move merge request routes under /-/ scope
-merge_request: 21126
-author:
-type: deprecated

changelogs/unreleased/dz-rename-custom-hooks.yml

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-title: Rename Custom hooks to Server hooks
-merge_request: 23064
-author:
-type: changed

changelogs/unreleased/dz-scope-commit-resource.yml

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-title: Move commit routes under - scope
-merge_request: 24279
-author:
-type: changed

changelogs/unreleased/dz-scope-project-issues-routing.yml

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-title: Copy issues routing under - scope
-merge_request: 23779
-author:
-type: changed

changelogs/unreleased/dz-scope-repository-routes.yml

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-title: Move repository routes under - scope
-merge_request: 20455
-author:
-type: deprecated

changelogs/unreleased/dz-scope-security-routes.yml

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-title: Move security routes under - scope
-merge_request: 24287
-author:
-type: changed

changelogs/unreleased/eb-no-keep-report-artifacts.yml

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-title: Remove keep button for non archive artifacts
-merge_request: 23762
-author:
-type: fixed

changelogs/unreleased/eb-preload-artifacts-merge-request-widget.yml

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-title: Fix N+1 queries caused by loading job artifacts archive in pipeline details
-  entity
-merge_request: 25250
-author:
-type: fixed

changelogs/unreleased/emails_disabled.yml

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-title: Add emails_disabled to projects API
-merge_request: 23616
-author: Mathieu Parent
-type: added

changelogs/unreleased/enable-disable-error-tracking-api.yml

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-title: Add API to enable and disable error tracking settings
-merge_request: 24220
-author: Rajendra Kadam
-type: added

changelogs/unreleased/error-tracking-api-followup.yml

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-title: Refactor error tracking specs and add validation to enabled field in error tracking model
-merge_request: 24892
-author: Rajendra Kadam
-type: added

changelogs/unreleased/es-guest-results.yml

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-title: Fix advanced global search permissions for guest users
-merge_request: 23177
-author:
-type: fixed