Fix nginx config typo

Fixes the following error:

    $ sudo service nginx restart
    Restarting nginx: nginx: [emerg] invalid number of arguments in "types_hash_max_size" directive in /etc/nginx/nginx.conf:27
Merge pull request #40 from joshbetz/patch-1

Fix nginx config typo
Merge branch 'master' of https://github.com/example42/puppet-nginx