Add missing PR link.

NEWS

@@ -1,5 +1,5 @@
 1.4.5
- * Log to file instead of syslog via command-line "--log-file" flag.
+ * Log to file instead of syslog via command-line "--log-file" flag (#233).
 
 1.4.4
  * #234: Support for Borg --keep-exclude-tags and --exclude-nodump options.