patch 8.1.1629: terminal function help is in the wrong file

Problem:    Terminal function help is in the wrong file.
Solution:   Move the function details to terminal.txt.
diff --git a/src/version.c b/src/version.c
index 4ce422a..258605b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -778,6 +778,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1629,
+/**/
     1628,
 /**/
     1627,