patch 8.2.1412: Vim: not operator does not result in boolean

Problem:    Vim: not operator does not result in boolean.
Solution:   Make type depend on operator. (issue 6678)  Fix using "false" and
            "true" in Vim9 script.
diff --git a/src/version.c b/src/version.c
index 64eca6b..4d86275 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1412,
+/**/
     1411,
 /**/
     1410,