docs: add multi-architecture.adoc to nav
** xref:configuration/runtime-resources.adoc[Runtime resources]
** xref:configuration/http-proxy.adoc[HTTP Proxy]
** xref:configuration/maven.adoc[Maven]
+** xref:configuration/multi-architecture.adoc[Multi Architecture]
* Observability
** xref:observability/logging.adoc[Logging]
*** xref:observability/logging/operator.adoc[Operator]
