Fix 404 errors and bad canonical URLs in Agent docs (#6919)

* Remove link that fails between Static and Flow

* Correvy bad canonical URL

* Correct bad canonical URL

docs/sources/flow/concepts/custom_components.md

@@ -5,7 +5,7 @@ aliases:
 - /docs/grafana-cloud/monitor-infrastructure/agent/flow/concepts/custom-components/
 - /docs/grafana-cloud/monitor-infrastructure/integrations/agent/flow/concepts/custom-components/
 - /docs/grafana-cloud/send-data/agent/flow/concepts/custom-components/
-canonical: https://grafana.com/docs/agent/latest/flow/concepts/custom-components/
+canonical: https://grafana.com/docs/agent/latest/flow/concepts/custom_components/
 description: Learn about custom components
 title: Custom components
 weight: 300

docs/sources/flow/tasks/metamonitoring.md

@@ -1,5 +1,5 @@
 ---
-canonical: https://grafana.com/docs/agent/latest/flow/tasks/setup-metamonitoring/
+canonical: https://grafana.com/docs/agent/latest/flow/tasks/metamonitoring/
 description: Learn how to set up meta-monitoring for Grafana Agent Flow
 title: Set up meta-monitoring
 weight: 200

docs/sources/shared/wal-data-retention.md

@@ -92,7 +92,7 @@ Deleting a WAL segment or a WAL file permanently deletes the stored WAL data.
 
 To delete the corrupted WAL:
 
-1. [Stop][] Grafana Agent.
+1. Stop Grafana Agent.
 1. Find and delete the contents of the `wal` directory.
 
    By default the `wal` directory is a subdirectory
@@ -107,10 +107,9 @@ To delete the corrupted WAL:
    * `prometheus.remote_write` component running in Flow mode
    {{< /admonition >}}
 
-1. [Start][Stop] Grafana Agent and verify that the WAL is working correctly.
+1. Start Grafana Agent and verify that the WAL is working correctly.
 
 [WAL block]: /docs/agent/<AGENT_VERSION>/flow/reference/components/prometheus.remote_write#wal-block
 [metrics config]: /docs/agent/<AGENT_VERSION>/static/configuration/metrics-config
-[Stop]: /docs/agent/<AGENT_VERSION>/flow/get-started/start-agent
 [wal_directory]: /docs/agent/<AGENT_VERSION>/static/configuration/metrics-config
 [run]: /docs/agent/<AGENT_VERSION>/flow/reference/cli/run