[pydotorg-www] updating https://wiki.python.org/moin/LocalUserGroups#Singapore

[Ivan]

Account name: IvanZim

Edits:

- <a class="http" href="http://www.pugs.org.sg/">Singapore PUG</a>   #  502
+ <a class="http" href="http://pugs.org.sg/">Singapore PUG</a>    #
and move it under Website
- <a class="http" href="http://ladypy.com/">LadyPy</a>    # invalid domain