Fixup apache#1468 Intermittent failure of CamelDevModeTest

docs/modules/ROOT/pages/extensions/main.adoc

@@ -20,3 +20,21 @@ Bootstrap Camel using Camel Main which brings advanced auto-configuration capabi
 ----
 
 Check the xref:user-guide/index.adoc[User guide] for more information about writing Camel Quarkus applications.
+
+== Additional Camel Quarkus configuration
+
+[width="100%",cols="80,5,15",options="header"]
+|===
+| Configuration property | Type | Default
+
+
+|icon:lock[title=Fixed at build time] [[quarkus.camel.main.shutdown.timeout]]`link:#quarkus.camel.main.shutdown.timeout[quarkus.camel.main.shutdown.timeout]`
+
+A timeout (with millisecond precision) to wait for `CamelMain++#++stop()` to finish
+| `java.time.Duration`
+| `PT3S`
+|===
+
+[.configuration-legend]
+icon:lock[title=Fixed at build time] Configuration property fixed at build time. All other configuration properties are overridable at runtime.
+