patch 8.1.2185: syntax test fails

Problem:    Syntax test fails.
Solution:   Add missing file patch.

Author: brammool

src/testdir/test_syntax.vim

@@ -555,14 +555,16 @@ func Test_syntax_c()
 	\ "\tfor (int i = 0; i < count; ++i) {",
 	\ "\t   break;",
 	\ "\t}",
+	\ "\tNote: asdf",
 	\ '}',
 	\ ], 'Xtest.c')
 
   " This makes the default for 'background' use "dark", check that the
   " response to t_RB corrects it to "light".
   let $COLORFGBG = '15;0'
 
-  let buf = RunVimInTerminal('Xtest.c', {})
+  let buf = RunVimInTerminal('Xtest.c', #{rows: 22})
+  call term_sendkeys(buf, ":syn keyword Search Note\r")
   call term_sendkeys(buf, ":set hlsearch\r")
   call term_sendkeys(buf, "/endif\r")
   call term_sendkeys(buf, "vjfC")

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2185,
 /**/
     2184,
 /**/