patch 8.2.4643: Vim9: variable may be locked unintentionally

Problem:    Vim9: variable may be locked unintentionally.
Solution:   Clear "v_lock". (closes #10036)
diff --git a/src/version.c b/src/version.c
index 9d3afeb..fe7f299 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4643,
+/**/
     4642,
 /**/
     4641,