patch 8.1.2403: autocmd test fails under valgrind

Problem:    Autocmd test fails under valgrind.
Solution:   Wait a bit longer.
diff --git a/src/testdir/test_autocmd.vim b/src/testdir/test_autocmd.vim
index c16a679..ab02402 100644
--- a/src/testdir/test_autocmd.vim
+++ b/src/testdir/test_autocmd.vim
@@ -2253,9 +2253,9 @@
   call WaitForAssert({-> assert_match('^xxxx', term_getline(buf, 6))}, 1000)
 
   call term_sendkeys(buf, ":let g:again = ''\<CR>:call CallTimer()\<CR>")
-  call term_wait(buf)
+  call term_wait(buf, 50)
   call term_sendkeys(buf, ":\<CR>")
-  call term_wait(buf)
+  call term_wait(buf, 50)
   call term_sendkeys(buf, ":echo g:again\<CR>")
   call WaitForAssert({-> assert_match('xtx', term_getline(buf, 6))}, 1000)
 
diff --git a/src/version.c b/src/version.c
index 8f098f2..f991cfb 100644
--- a/src/version.c
+++ b/src/version.c
@@ -743,6 +743,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2403,
+/**/
     2402,
 /**/
     2401,