[zanata/zanata-server] 3c8b9b: fix doc typo

[GitHub]

  Branch: refs/heads/overlay-changes
  Home:   https://github.com/zanata/zanata-server
  Commit: 3c8b9b973c0f77ac3220a64d7846827eb185f44e
      https://github.com/zanata/zanata-server/commit/3c8b9b973c0f77ac3220a64d7846827eb185f44e
  Author: Carlos A. Munoz <camunoz at redhat.com>
  Date:   2016-04-05 (Tue, 05 Apr 2016)

  Changed paths:
    M zanata-overlay/README.md

  Log Message:
  -----------
  fix doc typo