test/README.md: fix link

diff --git a/test/README.md b/test/README.md
index d6c7ba0..5a9aaa9 100755 (executable)
--- a/test/README.md
+++ b/test/README.md
@@ -48,5 +48,5 @@ return code shall be 0 on success or an integer in the range 1 - 255 on error
 
 ## SSL
 Test Keys and Certificates are provided in multiple formats under the following
-directory [test/keys](test/keys)
+directory [test/keys](keys)