patch 8.2.2331: Vim9: wrong error when modifying dict declared with :final

Problem:    Vim9: wrong error when modifying dict declared with :final.
Solution:   Do not check for writable variable when an index follows.
            (closes #7657)
diff --git a/src/version.c b/src/version.c
index 0a3cd54..f063d7b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2331,
+/**/
     2330,
 /**/
     2329,