[Doc] Add Ingest CSV Processor Plugin to plugin as a community plugin

Fix typo...

Author: johtani

docs/plugins/ingest.asciidoc

@@ -26,7 +26,7 @@ under the CCA-ShareAlike 3.0 license. For more details see, http://dev.maxmind.c
 A processor that extracts details from the User-Agent header value.
 
 [float]
-=== Community contributed repository plugins
+=== Community contributed ingest plugins
 
 The following plugin has been contributed by our community: