fix dropdown heading

solutions/observability/apps/fleet-managed-apm-server.md

@@ -147,7 +147,7 @@ If you don’t have a {{fleet}} setup already in place, the easiest way to get s
 ::::{admonition}
 An internet connection is required to install the APM integration via the Fleet UI in Kibana.
 
-::::{dropdown} **If you don’t have an internet connection**
+::::{dropdown} If you don’t have an internet connection
 If your environment has network traffic restrictions, there are other ways to install the APM integration. See [Air-gapped environments](asciidocalypse://docs/docs-content/docs/reference/ingestion-tools/fleet/air-gapped.md) for more information.
 
 Option 1: Update `kibana.yml`