patch 8.2.0303: TermChanged test fails in the GUI

Problem:    TermChanged test fails in the GUI.
Solution:   Skip the test when running the GUI.

Author: brammool

src/testdir/test_autocmd.vim

@@ -2387,6 +2387,8 @@ func LogACmd()
 endfunc
 
 func Test_TermChanged()
+  CheckNotGui
+
   enew!
   tabnew
   call setline(1, ['a', 'b', 'c', 'd'])

src/version.c

@@ -738,6 +738,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    303,
 /**/
     302,
 /**/