Fix link to Fuel team structure
Fix link to Fuel team structure

Replace link to review [1] to link to github [2]
   [1] https://review.openstack.org/#/c/225376/
   [2] https://github.com/stackforge/fuel-specs/blob/master/policy/team-structure.rst

Change-Id: Ie0de9f19e67ccd7ea9fe7cd5b1808ad085ace768

stackforge/fuel-devops,stackforge/fuel-devops