Fix the anchor for the Micrometer Elasticsearch section

Closes gh-15610

Author: izeye

spring-boot-project/spring-boot-docs/src/main/asciidoc/production-ready-features.adoc

@@ -1348,7 +1348,7 @@ monitoring systems, including:
 - <<production-ready-metrics-export-atlas,Atlas>>
 - <<production-ready-metrics-export-datadog,Datadog>>
 - <<production-ready-metrics-export-dynatrace,Dynatrace>>
-- <<production-ready-metrics-export-dynatrace,Elastic>>
+- <<production-ready-metrics-export-elastic,Elastic>>
 - <<production-ready-metrics-export-ganglia,Ganglia>>
 - <<production-ready-metrics-export-graphite,Graphite>>
 - <<production-ready-metrics-export-humio,Humio>>