Add BigQuery job labels to changelog.

CHANGELOG.md

@@ -10,6 +10,7 @@
 ### Features
 - Add optional configs for `require_partition_filter` and `partition_expiration_days` in BigQuery ([#1843](https://github.com/fishtown-analytics/dbt/issues/1843), [#2928](https://github.com/fishtown-analytics/dbt/pull/2928))
 - Fix for EOL SQL comments prevent entire line execution ([#2731](https://github.com/fishtown-analytics/dbt/issues/2731), [#2974](https://github.com/fishtown-analytics/dbt/pull/2974))
+- Use query comment JSON as job labels for BigQuery adapter when `query-comment.job-label` is set to `true` ([#2483](https://github.com/fishtown-analytics/dbt/issues/2483)), ([#3145](https://github.com/fishtown-analytics/dbt/pull/3145))
 
 ### Under the hood
 - Add dependabot configuration for alerting maintainers about keeping dependencies up to date and secure. ([#3061](https://github.com/fishtown-analytics/dbt/issues/3061), [#3062](https://github.com/fishtown-analytics/dbt/pull/3062))
@@ -23,6 +24,7 @@ Contributors:
 - [ran-eh](https://github.com/ran-eh) ([#3036](https://github.com/fishtown-analytics/dbt/pull/3036))
 - [@pcasteran](https://github.com/pcasteran) ([#2976](https://github.com/fishtown-analytics/dbt/pull/2976))
 - [@VasiliiSurov](https://github.com/VasiliiSurov) ([#3104](https://github.com/fishtown-analytics/dbt/pull/3104))
+- [@jmcarp](https://github.com/jmcarp) ([#3145](https://github.com/fishtown-analytics/dbt/pull/3145))
 
 ## dbt 0.19.1 (Release TBD)