fix-warning

/home/melta101/Documents/bb_GSoC/gsoc.beagleboard.io/guides/contributor.rst:4: WARNING: Duplicate explicit target name: "openbeagle". /home/melta101/Documents/bb_GSoC/gsoc.beagleboard.io/guides/mentor.rst:42: ERROR: Unknown directive type "admonishment".

.. admonishment:: Remember

BeagleBoard.org mentored GSoC projects are supposed to be for software projects that service the Beagle and general open source
embedded systems community, not theses, how-to guides or what I did over my summer vacation ideas.

/home/melta101/Documents/bb_GSoC/gsoc.beagleboard.io/guides/index.rst:6: WARNING: undefined label: 'gsoc-contribution-guide' /home/melta101/Documents/bb_GSoC/gsoc.beagleboard.io/guides/proposal.rst:50: WARNING: undefined label: 'gsoc-contribution-guide' /home/melta101/Documents/bb_GSoC/gsoc.beagleboard.io/guides/proposal.rst:50: WARNING: undefined label: 'gsoc-contribution-guide'

build succeeded, 5 warnings.

Had the above warning