git-remote-testgit: fix race when spawning fast-import

diff --git a/RelNotes b/RelNotes
index 509b3f6044d1f0f5091c8e65826747d524ab12d0..2c2a16955519b3c314ebdb3d2f0c08d544666ca1 120000 (symlink)
--- a/RelNotes
+++ b/RelNotes
@@ -1 +1 @@
-Documentation/RelNotes-1.5.3.7.txt
\ No newline at end of file
+Documentation/RelNotes/1.7.10.txt
\ No newline at end of file