NEWS: fix typo [ci skip]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52230 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

NEWS

@@ -129,7 +129,7 @@ with all sufficient information, see the ChangeLog file.
   * Socket#connect_nonblock, Socket#accept_nonblock,
     TCPServer#accept_nonblock, UNIXServer#accept_nonblock,
     BasicSocket#recv_nonblock, BasicSocket#recvmsg_nonblock,
-    BasicSocket#sendmsg_nonblock all support `exception :false` to return
+    BasicSocket#sendmsg_nonblock all support `exception: false` to return
     :wait_readable or :wait_writable symbols instead of raising
     IO::WaitReadable or IO::WaitWritable exceptions
   * BasicSocket#recv and BasicSocket#recv_nonblock allow an output