readme: remove mention to pcapng file type

Since we're not accepting this format for now, better not to be
misleading.

diff --git a/README.md b/README.md
index 145574f49b30a2ac9520c13e08406741d8fcac43..8bd109c9651c3a07128c71809859914740c55ace 100644 (file)
--- a/README.md
+++ b/README.md
@@ -21,7 +21,7 @@ Or to run a single test:
 - Create a directory that is the name of the new test.
 
 - Copy a single pcap file into the test directory. It must end in
-  ".pcap" or ".pcapng".
+  ".pcap".
 
   This is enough for a basic test that will run Suricata over the pcap
   testing for a successful exit code.