patch 8.2.3757: an overlong highlight group name is silently truncated

Problem:    An overlong highlight group name is silently truncated.
Solution:   Give an error if the name is too long. (closes #9289)
diff --git a/src/version.c b/src/version.c
index c586acb..ccd3cf4 100644
--- a/src/version.c
+++ b/src/version.c
@@ -754,6 +754,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3757,
+/**/
     3756,
 /**/
     3755,