v1.20 Release

Finish the release notes for the 1.20 release.

Signed-off-by: Zach Brown <zab@versity.com>

ReleaseNotes.md

@@ -1,6 +1,15 @@
 Versity ScoutFS Release Notes
 =============================
 
+---
+v1.20
+\
+*Apr 22, 2024*
+
+Minor changes to packaging to better support "weak" module linking of
+the kernel module, and to including git hashes in the built package.  No
+changes in runtime behaviour.
+
 ---
 v1.19
 \