patch 8.2.2555: Vim9: missing test for 8.2.2553

Problem:    Vim9: missing test for 8.2.2553.
Solution:   Add a simple test.
diff --git a/src/version.c b/src/version.c
index 6f05f36..1dfd0d6 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2555,
+/**/
     2554,
 /**/
     2553,