Use "git merge" instead of "git pull ."

diff --git a/RelNotes b/RelNotes
index a5201213ac9907a441253399dc1021859f92bf5d..fce99fb79d16cbeb717ddbe36c7be231a00e4eba 120000 (symlink)
--- a/RelNotes
+++ b/RelNotes
@@ -1 +1 @@
-Documentation/RelNotes/1.8.3.3.txt
\ No newline at end of file
+Documentation/RelNotes/1.8.4.txt
\ No newline at end of file