v1.6 Release

Finish the release notes for the 1.6 release.

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

ReleaseNotes.md

@@ -1,6 +1,22 @@
 Versity ScoutFS Release Notes
 =============================
 
+---
+v1.6
+\
+*Jul 7, 2022*
+
+* **Fix memory leaks in rare corner cases**
+\
+  Analysis tools found a few corner cases that leaked small structures,
+  generally around error handling or startup and shutdown.
+
+* **Add --skip-likely-huge scoutfs print command option**
+\
+  Add an option to scoutfs print to reduce the size of the output
+  so that it can be used to see system-wide metadata without being
+  overwhelmed by file-level details.
+
 ---
 v1.5
 \