stash: require a clean index to apply

diff --git a/RelNotes b/RelNotes
index e90dc8ee42fe41d3c4eb09d324d8d2de6aff425b..c5fa3efb98246d99bdf736237b7cf759f01a1657 120000 (symlink)
--- a/RelNotes
+++ b/RelNotes
@@ -1 +1 @@
-Documentation/RelNotes-1.6.2.3.txt
\ No newline at end of file
+Documentation/RelNotes/2.2.2.txt
\ No newline at end of file