patch 8.2.1209: Vim9: test failure

Problem:    Vim9: test failure.
Solution:   Add missing changes to hashtab.
diff --git a/src/hashtab.c b/src/hashtab.c
index 816dcf7..f114b28 100644
--- a/src/hashtab.c
+++ b/src/hashtab.c
@@ -236,6 +236,7 @@
 	return FAIL;
 
     ++ht->ht_used;
+    ++ht->ht_changed;
     if (hi->hi_key == NULL)
 	++ht->ht_filled;
     hi->hi_key = key;
@@ -271,6 +272,7 @@
 hash_remove(hashtab_T *ht, hashitem_T *hi)
 {
     --ht->ht_used;
+    ++ht->ht_changed;
     hi->hi_key = HI_KEY_REMOVED;
     hash_may_resize(ht, 0);
 }
@@ -448,6 +450,7 @@
     ht->ht_array = newarray;
     ht->ht_mask = newmask;
     ht->ht_filled = ht->ht_used;
+    ++ht->ht_changed;
     ht->ht_error = FALSE;
 
     return OK;
diff --git a/src/version.c b/src/version.c
index 3997ccf..f49eec9 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1209,
+/**/
     1208,
 /**/
     1207,