MT#19997 Fix FaxRecordings description

Change-Id: I379558d2e7ee6ab6866edc500ab26057e1387f62

lib/NGCP/Panel/Controller/API/FaxRecordings.pm

@@ -22,7 +22,7 @@ sub allowed_methods{
 }
 
 sub api_description {
-    return 'Defines the actual recording of fax messages. It is referred to by the <a href="#faxes">Faxes</a> relation. A GET on an item returns the binary blob of the recording with Content-Type "audio/x-wav".';
+    return 'Defines the actual recording of fax messages. It is referred to by the <a href="#faxes">Faxes</a> relation. A GET on an item returns the fax in the binary format as it was sent: tiff, ps or pdf.';
 };
 
 use parent qw/Catalyst::Controller NGCP::Panel::Role::API::FaxRecordings/;