patch 8.2.2858: test fails because of changed error message

Problem:    Test fails because of changed error message.
Solution:   Adjust the expected error message.
diff --git a/src/version.c b/src/version.c
index e45d3be..018e47d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2858,
+/**/
     2857,
 /**/
     2856,