patch 8.2.0701: Vim9 test fails without job feature

Problem:    Vim9 test fails without job feature.
Solution:   Add feature check.

src/testdir/test_vim9_script.vim

@@ -466,19 +466,21 @@ def Test_try_catch_fails()
   call CheckDefFailure(['throw xxx'], 'E1001:')
 enddef
 
-let someJob = test_null_job()
+if has('channel')
+  let someJob = test_null_job()
 
-def FuncWithError()
+  def FuncWithError()
     echomsg g:someJob
-enddef
+  enddef
 
-func Test_convert_emsg_to_exception()
+  func Test_convert_emsg_to_exception()
     try
       call FuncWithError()
     catch
       call assert_match('Vim:E908:', v:exception)
     endtry
-endfunc
+  endfunc
+endif
 
 let s:export_script_lines =<< trim END
   vim9script

src/version.c

@@ -746,6 +746,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    701,
 /**/
     700,
 /**/