cache-tree: Write updated cache-tree after commit

diff --git a/RelNotes b/RelNotes
index d57124075c1451ae51eb17935669a4cedff4c605..7879c7dc372705f06decbd745dec7fe1fad1b428 120000 (symlink)
--- a/RelNotes
+++ b/RelNotes
@@ -1 +1 @@
-Documentation/RelNotes-1.6.6.1.txt
\ No newline at end of file
+Documentation/RelNotes/2.0.1.txt
\ No newline at end of file