patch 8.2.3368: not all Racket files are recognized

Problem:    Not all Racket files are recognized.
Solution:   Also recognize .rktl and .rktd files. (Doug Kearns)
diff --git a/src/version.c b/src/version.c
index 619c840..a439d99 100644
--- a/src/version.c
+++ b/src/version.c
@@ -756,6 +756,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3368,
+/**/
     3367,
 /**/
     3366,