Fix typo in Changelog

CHANGELOG

-Version 5.67.0 -- Mars 2019
+Version 5.67.0 -- March 2019
 ===========================
 
 * **Add support for x64 bits OS.

lib/log.doc

@@ -3,7 +3,7 @@
 |                                                                              |
 |                                                                              |
 |                  An Introduction to LOG with AnaLOG                          |
-|                           5.66                                        |
+|                           5.67                                               |
 |    LOG and DigLOG, Copyright (C) 1985, 1990 by David Gillespie               |
 |    AnaLOG, Copyright (C) 1985, 1990 by John Lazzaro                          |
 |    Correspondence to lazzaro@cs.berkeley.edu or daveg@synaptics.com          |