patch 8.2.2771: Vim9: assignment not recognized if declaration was skipped

Problem:    Vim9: assignment not recognized if declaration was skipped.
Solution:   Also recognized an assignment if the variable does not exist.
            (closes #8108)
diff --git a/src/version.c b/src/version.c
index 8cbe3d3..44cf5ff 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2771,
+/**/
     2770,
 /**/
     2769,