patch 8.2.1506: Vim9: no error when using a number other than 0 or 1 as bool

Problem:    Vim9: no error when using a number other than 0 or 1 as bool.
Solution:   Check the number is 0 or 1.
diff --git a/src/version.c b/src/version.c
index 843fd43..575f343 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1506,
+/**/
     1505,
 /**/
     1504,