EmbeddedObjects.lyx: backport recent changes

lib/doc/Changelog-EmbeddedObjects-LyX_22x.txt

@@ -1,4 +1,11 @@
-Modified:
+For LyX 2.2.3:
+
+- sec. 2.11.3: new description of how to change table line colors 
+
+
+For LyX 2.2.0:
+
+Modified:
 
 first step:
 - sec. 2.2: (Japanese only) added a sentence

lib/doc/Changelog-UserGuide-LyX_22x.txt

@@ -1,6 +1,6 @@
 For LyX 2.2.3:
 
-- sec. 2.5.1: new sentence 
+- sec. 2.5.1: new sentence
 - sec. B.20: section was renamed