manual: Bump date to the date of the last change.

diff --git a/manual/manual.txt b/manual/manual.txt
index c4a31277760461b5b1bf571543a0ad2caf610824..19baff63157442dddefa605b8a7600a0225601d1 100644 (file)
--- a/manual/manual.txt
+++ b/manual/manual.txt
@@ -1,6 +1,6 @@
 PulseView User Manual
 =====================
-unreleased development snapshot, dated 2018-10-29
+unreleased development snapshot, dated 2020-02-29
 :doctype: book
 :imagesdir: ./images
 :sectnums: