patch 8.2.2452: no completion for the 'filetype' option

Problem:    No completion for the 'filetype' option.
Solution:   Add filetype completion. (Martin Tournoij, closes #7747)
diff --git a/src/version.c b/src/version.c
index cc8c728..c5f21db 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2452,
+/**/
     2451,
 /**/
     2450,