Fixed version numbers.

Author: Derick Rethans

Zend/README.ZEND_MM

@@ -27,7 +27,7 @@ Zend MM disabled:
 Shared extensions:
 ------------------
 
-Since PHP 5.4 it is possible to prevent shared extensions from unloading so
+Since PHP 5.3.11 it is possible to prevent shared extensions from unloading so
 that valgrind can correctly track the memory leaks in shared extensions. For
 this there is the ZEND_DONT_UNLOAD_MODULES environment variable. If set, then
 DL_UNLOAD() is skipped during the shutdown of shared extensions.