Fix issue number of pgsql ECS transition changelog entry. (#10573)

CHANGELOG.asciidoc

@@ -208,7 +208,7 @@ https://github.com/elastic/beats/compare/v7.0.0-alpha1...v7.0.0-alpha2[Check the
 - Use `log.source.address` instead of `log.source.ip` for network input sources. {pull}9487[9487]
 - Rename many `redis.log.*` fields to map to ECS. {pull}9315[9315]
 - Rename many `icinga.*` fields to map to ECS. {pull}9294[9294]
-- Rename many `postgresql.log.*` fields to map to ECS. {pull}9303[9303]
+- Rename many `postgresql.log.*` fields to map to ECS. {pull}9308[9308]
 - Rename many `kafka.log.*` fields to map to ECS. {pull}9297[9297]
 - Add `convert_timezone` option to Logstash module to convert dates to UTC. {issue}9756[9756] {pull}9797[9797]