patch 8.2.2387: runtime type check does not mention argument index

Problem:    Runtime type check does not mention argument index.
Solution:   Add ct_arg_idx. (closes #7720)
diff --git a/src/version.c b/src/version.c
index a739270..c911ed4 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2387,
+/**/
     2386,
 /**/
     2385,