patch 8.2.0697: Vim9: memory leak when using nested function

Problem:    Vim9: memory leak when using nested function.
Solution:   Unreference function when deleting instructions. Adjust reference
            count for local variables.
diff --git a/src/version.c b/src/version.c
index 38755db..edbfa93 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    697,
+/**/
     696,
 /**/
     695,