patch 8.2.4058: Vim9: import test failure in wrong line

Problem:    Vim9: import test failure in wrong line.
Solution:   Adjust line number.

src/testdir/test_vim9_import.vim

@@ -332,7 +332,7 @@ def Test_vim9_import_export()
     defcompile
   END
   writefile(import_missing_name_lines, 'Ximport.vim')
-  assert_fails('source Ximport.vim', 'E1259:', '', 3)
+  assert_fails('source Ximport.vim', 'E1259:', '', 1)
 
   var import_assign_wrong_type_lines =<< trim END
     vim9script

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4058,
 /**/
     4057,
 /**/