Restore nested nav (#1890)

* Restore nested nav

* Don't change navigation structure but the path_prefix only

So we can keep the URLs

---------

Co-authored-by: Jan Calanog <[email protected]>

Author: theletterf

config/navigation.yml

@@ -337,19 +337,19 @@ toc:
           - toc: elastic-agent://reference/edot-collector
             path_prefix: reference/edot-collector
           - toc: apm-agent-android://reference/edot-android
-            path_prefix: reference/edot-sdks/android
+            path_prefix: reference/opentelemetry/edot-sdks/android
           - toc: elastic-otel-dotnet://reference/edot-dotnet
-            path_prefix: reference/edot-sdks/dotnet
+            path_prefix: reference/opentelemetry/edot-sdks/dotnet
           - toc: apm-agent-ios://reference/edot-ios
-            path_prefix: reference/edot-sdks/ios
+            path_prefix: reference/opentelemetry/edot-sdks/ios
           - toc: elastic-otel-java://reference/edot-java
-            path_prefix: reference/edot-sdks/java
+            path_prefix: reference/opentelemetry/edot-sdks/java
           - toc: elastic-otel-node://reference/edot-node
-            path_prefix: reference/edot-sdks/node
+            path_prefix: reference/opentelemetry/edot-sdks/node
           - toc: elastic-otel-php://reference/edot-php
-            path_prefix: reference/edot-sdks/php
+            path_prefix: reference/opentelemetry/edot-sdks/php
           - toc: elastic-otel-python://reference/edot-python
-            path_prefix: reference/edot-sdks/python
+            path_prefix: reference/opentelemetry/edot-sdks/python
 
       # Ingestion tools
       # https://github.com/elastic/docs-content/blob/main/reference/ingestion-tools/toc.yml