Publish changelog for api-2023.10.23.11.40.59 (#3238)

Co-authored-by: obulat <[email protected]>

Author: openverse-bot

documentation/changelogs/api/2023.10.23.11.40.59.md

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+# 2023.10.23.11.40.59
+
+## Improvements
+
+- Use top-level `keyword` fields instead of subfields
+  ([#3161](https://github.com/WordPress/openverse/pull/3161)) by @dhruvkb
+
+## Bug Fixes
+
+- Make API nginx log once per request
+  ([#3163](https://github.com/WordPress/openverse/pull/3163)) by @obulat