fix doc/release_tasks.rst
fix doc/release_tasks.rst

sfepy/sfepy,BubuLK/sfepy,rc/sfepy,vlukes/sfepy,lokik/sfepy,BubuLK/sfepy,BubuLK/sfepy,lokik/sfepy,sfepy/sfepy,RexFuzzle/sfepy,RexFuzzle/sfepy,rc/sfepy,lokik/sfepy,RexFuzzle/sfepy,rc/sfepy,RexFuzzle/sfepy,lokik/sfepy,sfepy/sfepy,vlukes/sfepy,vlukes/sfepy