api client and quidel page renaming

Author: nmdefries

docs/api/client_libraries.md

@@ -1,6 +1,7 @@
 ---
-title: API Client
+title: API Clients
 parent: Other Endpoints (COVID-19 and Other Diseases)
+nav_order: 1
 ---
 
 # Epidata API Clients

docs/api/covidcast_clients.md

@@ -1,10 +1,10 @@
 ---
-title: COVIDcast API Clients
+title: API Clients
 parent: COVIDcast Main Endpoint
 nav_order: 1
 ---
 
-# COVIDcast Libraries
+# Main Endpoint API Clients
 
 To access COVIDcast data, we recommend using the following client libraries:
 

docs/api/quidel.md

@@ -1,10 +1,10 @@
 ---
-title: Quidel Endpoint Access
+title: Quidel
 parent: Data Sources and Signals
 nav_order: 2
 ---
 
-# Quidel Endpoint Access
+# Quidel
 
 This is the documentation of the API for accessing the Quidel (`quidel`) endpoint of the Delphi’s epidemiological data.