Fix wrong link in "Configure APM Agent Central Configuration" doc (#4165)

## Summary

This PR fixes an incorrect link in the [Configure APM Agent Central
Configuration](https://www.elastic.co/docs/solutions/observability/apm/apm-server/apm-agent-central-configuration)
doc.

## Generative AI disclosure

1. Did you use a generative AI (GenAI) tool to assist in creating this
contribution?
- [ ] Yes  
- [x] No

Author: vishaangelova

solutions/observability/apm/apm-server/apm-agent-central-configuration.md

@@ -20,7 +20,7 @@ APM agent central configuration is supported by all APM Server deployment method
 
 APM Agent Central Configuration allows you to fine-tune your APM agents from within the Applications UI. Changes are automatically propagated to your agents, so there’s no need to redeploy your applications.
 
-To learn more about this feature, see [APM Agent Central Configuration](/solutions/observability/apm/apm-server/apm-agent-central-configuration.md).
+To learn more about this feature, see [APM Agent Central Configuration](/solutions/observability/apm/apm-agents/central-configuration.md).
 
 ::::{note}
 To configure EDOT SDKs through APM Agent Central Configuration, refer to [EDOT SDKs Central Configuration](opentelemetry://reference/central-configuration.md).