docs: Add waffle 1.6.3 release notes

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>

doc/release-notes/waffle-1.6.3.md

+# Waffle 1.6.3 Release Notes
+
+## Fixes since 1.6.2
+
+* Recreate release tarballs from tag
+
+
+## Features since 1.6.2
+
+None.
+
+
+## Changes since 1.6.2
+
+Emil Velikov (1):
+      bump version for 1.6.3 release
+