patch 8.2.3522: cannot use \x and \u when setting 'listchars'

Problem:    Cannot use \x and \u when setting 'listchars'.
Solution:   Support hex and unicode in hex form. (closes #9006)
diff --git a/src/version.c b/src/version.c
index 16e49ac..1b6e997 100644
--- a/src/version.c
+++ b/src/version.c
@@ -758,6 +758,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3522,
+/**/
     3521,
 /**/
     3520,