[skip ci] UPGRADING: minor typo fix

Author: LamentXU123

UPGRADING

@@ -43,6 +43,7 @@ PHP 8.7 UPGRADE NOTES
     locales known to ICU, and the matching entry is returned as passed.
     A ValueError is thrown if the array is empty or contains an invalid
     locale, and a TypeError if it contains a non-string value.
+
 - Streams:
   . The so_linger, so_rcvbuf and so_sndbuf stream socket context options are
     now also applied to unix and unix datagram sockets.