updated reference nav order, nested client libraries under api

content/v2.0/reference/api/_index.md

@@ -48,4 +48,4 @@ and visit the `/docs` endpoint in a browser ([localhost:9999/docs](http://localh
 
 ## InfluxDB client libraries
 InfluxDB client libraries are language-specific packages that integrate with the InfluxDB v2 API.
-For information about supported client libraries, see [InfluxDB client libraries](/v2.0/reference/client-libraries/).
+For information about supported client libraries, see [InfluxDB client libraries](/v2.0/reference/api/client-libraries/).

content/v2.0/reference/api/client-libraries.md

@@ -3,10 +3,13 @@ title: InfluxDB client libraries
 description: >
   InfluxDB client libraries are language-specific tools that integrate with the InfluxDB v2 API.
   View the list of available client libraries.
-weight: 4
+weight: 103
+aliases:
+  - /v2.0/reference/client-libraries/
 menu:
   v2_0_ref:
     name: Client libraries
+    parent: InfluxDB v2 API
 v2.0/tags: [client libraries]
 ---
 

content/v2.0/reference/flux/_index.md

@@ -5,7 +5,7 @@ v2.0/tags: [flux]
 menu:
   v2_0_ref:
     name: Flux language
-weight: 4
+weight: 3
 ---
 
 The following articles are meant as a reference for the Flux standard library and