upload-pack: use peel_ref for ref advertisements

diff --git a/RelNotes b/RelNotes
index a479abbc60611a95d75a33b092a322cb5fa2832c..9cd9140a6b6e8ee15dc2b237795b1117b0140842 120000 (symlink)
--- a/RelNotes
+++ b/RelNotes
@@ -1 +1 @@
-Documentation/RelNotes-1.7.2.1.txt
\ No newline at end of file
+Documentation/RelNotes/1.7.12.3.txt
\ No newline at end of file