Adds information about the issue #904 on the CHANGES file

Author: Felipe Zimmerle

CHANGES

@@ -1,6 +1,10 @@
 DD mmm YYYY - X.Y.Z (To be released)
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+ * Fix the input filter on ModSecurity Standalone. By fixing the input filter
+   ModSecurity is able to perform full inspection of the request body,
+   regardless its size.
+   [Issue #142, #582 and #830 - Andrey Kolganov (KEMP Technologies)]
  * Added support to generate audit logs in JSON format.
    [Issue #914, #897, #656 - Robert Paprocki]
  * Creating AuditLog serial file (or paralel index) respecting the