patch 8.2.3123: Vim9: confusing error when using white space after option

Problem:    Vim9: confusing error when using white space after option, before
            one of "!&<".
Solution:   Give a specific error. (issue #8408)
diff --git a/src/version.c b/src/version.c
index 518844f..56c9f90 100644
--- a/src/version.c
+++ b/src/version.c
@@ -756,6 +756,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3123,
+/**/
     3122,
 /**/
     3121,