patch 8.2.3991: Vim9: error when extending dict<any>

Problem:    Vim9: error when extending dict<any> with another type that it was
            initialized with.
Solution:   Also set the type for dict<any> if the initializer has a more
            specific type. (closes #9461)
diff --git a/src/version.c b/src/version.c
index 6ad1090..96864ef 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3991,
+/**/
     3990,
 /**/
     3989,