Add changelog entry as this is user visible

CHANGELOG.md

@@ -66,6 +66,7 @@
 * [11657](https://github.com/grafana/loki/pull/11657) **ashwanthgoli** Log results cache: compose empty response based on the request being served to avoid returning incorrect limit or direction.
 * [11587](https://github.com/grafana/loki/pull/11587) **trevorwhitney** Fix semantics of label parsing logic of metrics and logs queries. Both only parse the first label if multiple extractions into the same label are requested.
 * [11776](https://github.com/grafana/loki/pull/11776) **ashwanthgoli** Background Cache: Fixes a bug that is causing the background queue size to be incremented twice for each enqueued item.
+* [11921](https://github.com/grafana/loki/pull/11921) **paul1r**: Parsing: String array elements were not being parsed correctly in JSON processing 
 
 ##### Changes