patch 8.2.1669: Vim9: memory leak when storing a value fails

Problem:    Vim9: memory leak when storing a value fails.
Solution:   Free the value when not storing it.
diff --git a/src/version.c b/src/version.c
index 305f0cb..4f8b503 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1669,
+/**/
     1668,
 /**/
     1667,