Update CHANGELOG.md for 12.8.3

[ci skip]

CHANGELOG.md

@@ -2,6 +2,29 @@
 documentation](doc/development/changelog.md) for instructions on adding your own
 entry.
 
+## 12.8.3
+
+### Fixed (8 changes)
+
+- Fix Group Import API file upload when object storage is disabled. !25715
+- Fix Web IDE fork modal showing no text. !25842
+- Fixed regression when URL was encoded in a loop. !25849
+- Fixed repository browsing for folders with non-ascii characters. !25877
+- Fix search for Sentry error list. !26129
+- Send credentials with GraphQL fetch requests. !26386
+- Show CI status in project dashboards. !26403
+- Rescue invalid URLs during badge retrieval in asset proxy. !26524
+
+### Performance (2 changes)
+
+- Disable Marginalia line backtrace in production. !26199
+- Remove unnecessary Redis deletes for broadcast messages. !26541
+
+### Other (1 change, 1 of them is from the community)
+
+- Fix fixtures for Error Tracking Web UI. !26233 (Takuya Noguchi)
+
+
 ## 12.8.2
 
 ### Security (17 changes)

changelogs/unreleased/207837-circular-encoding.yml

----
-title: Fixed regression when URL was encoded in a loop
-merge_request: 25849
-author:
-type: fixed

changelogs/unreleased/207857-fix-web-ide-modal-no-text.yml

----
-title: Fix Web IDE fork modal showing no text
-merge_request: 25842
-author:
-type: fixed

changelogs/unreleased/208548-better-spec-test-for-error-tracking-web-ui.yml

----
-title: Fix fixtures for Error Tracking Web UI
-merge_request: 26233
-author: Takuya Noguchi
-type: other

changelogs/unreleased/georgekoltsov-fix-import-export-uploader.yml

----
-title: Fix Group Import API file upload when object storage is disabled
-merge_request: 25715
-author:
-type: fixed

changelogs/unreleased/lm-fix-error-query.yml

----
-title: Fix search for Sentry error list
-merge_request: 26129
-author:
-type: fixed

changelogs/unreleased/ph-p207499-fixNonAsciiChars.yml

----
-title: Fixed repository browsing for folders with non-ascii characters
-merge_request: 25877
-author:
-type: fixed

changelogs/unreleased/revert-e0613e64.yml

----
-title: Show CI status in project dashboards
-merge_request: 26403
-author:
-type: fixed

changelogs/unreleased/sh-disable-line-in-marginalia.yml

----
-title: Disable Marginalia line backtrace in production
-merge_request: 26199
-author:
-type: performance

changelogs/unreleased/sh-optimize-broadcast-message-redis.yml

----
-title: Remove unnecessary Redis deletes for broadcast messages
-merge_request: 26541
-author:
-type: performance

changelogs/unreleased/use-addressable-for-asset-proxy-badge-render.yml

----
-title: Rescue invalid URLs during badge retrieval in asset proxy
-merge_request: 26524
-author:
-type: fixed

changelogs/unreleased/vs-add-credentials-option-for-apollo-link.yml

----
-title: Send credentials with GraphQL fetch requests
-merge_request: 26386
-author:
-type: fixed