Update no-adserver.md (prebid#6027)

* Update no-adserver.md

* Update no-adserver.md

* Update sidebar.yml

Author: patmmccann

_data/sidebar.yml

@@ -258,7 +258,7 @@
   subgroup: 1
 
 - sbSecId: 1
-  title: Running without an ad server
+  title: Running Prebid.js as an ad server
   link: /dev-docs/examples/no-adserver.html
   isHeader: 0
   isSectionHeader: 0

dev-docs/examples/no-adserver.md

@@ -1,12 +1,12 @@
 ---
 layout: example
-title: No Adserver Example
+title: Prebid as Adserver Example
 left_nav_override: Examples
-description: Running Prebid.js without an ad server
+description: Running Prebid.js as an ad server
 sidebarType: 1
 
 about:
-- This example demonstrates running an auction and rendering without an ad server.
+- This example demonstrates running an auction and rendering; using Prebid.js as an ad server.
 
 jsfiddle_link: jsfiddle.net/Prebid_Examples/svumodbe/embedded/html,result