patch 8.2.3457: MS-Windows Vim9: test executed and fails

Problem:    MS-Windows Vim9: test executed and fails.
Solution:   Add extra check for not being on MS-Windows.

src/testdir/test_vim9_script.vim

@@ -4278,6 +4278,10 @@ def Test_no_unknown_error_after_error()
   if !has('unix') || !has('job')
     throw 'Skipped: not unix of missing +job feature'
   endif
+  # FIXME: this check should not be needed
+  if has('win32')
+    throw 'Skipped: does not work on MS-Windows'
+  endif
   var lines =<< trim END
       vim9script
       var source: list<number>

src/version.c

@@ -757,6 +757,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3457,
 /**/
     3456,
 /**/