Correct date

Author: fgsch

CHANGES

@@ -5,7 +5,7 @@
   or the CRS mailinglist at
 * https://lists.owasp.org/mailman/listinfo/owasp-modsecurity-core-rule-set
 
-== Version 3.1.1 - 2018-06-26 ==
+== Version 3.1.1 - 2019-06-26 ==
  * Fix CVE-2019-11387 ReDoS against CRS on ModSecurity 3 at PL 2 (Christoph Hansen, Federico G. Schwindt)
  * Content-Type made case insensitive in 920240, 920400 (Federico G. Schwindt)
  * Allow % encoding in 920240 (Christoph Hansen)