patch 8.2.1807: can use :help in a terminal popup window

Problem:    Can use :help in a terminal popup window.
Solution:   Give an error. (closes #7088)
diff --git a/src/version.c b/src/version.c
index a410167..daac372 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1807,
+/**/
     1806,
 /**/
     1805,