patch 8.2.4218: illegal memory access with bracketed paste in Ex mode

Problem:    Illegal memory access with bracketed paste in Ex mode.
Solution:   Reserve space for the trailing NUL.
diff --git a/src/version.c b/src/version.c
index 6685b55..9dcf349 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4218,
+/**/
     4217,
 /**/
     4216,