patch 8.2.2439: not easy to figure out what packages to get

Problem:    Not easy to figure out what packages to get when installing Vim on
            a new Ubuntu system.
Solution:   Mention explicit commands that are easy to follow.
diff --git a/src/version.c b/src/version.c
index fe5d219..0ef8006 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2439,
+/**/
     2438,
 /**/
     2437,