Mistype in the installation instructions

There is a mistype in the Installation instruction. You have it like this:

…Install the “PECL memcached extension” and…

The issue with “PECL memcached extension” link. It says “memcached” while should say “memcache”; the URL is correct. This is not a minor mistype because we have actually two different extensions — “memcache” and “memcached”.