[OSGeo-Standards] [vote] update Terms of Reference with Charter Member requirement

[Tom Kralidis]

Hi all: motion passes with +1 from Codrina, Howard, Even, Maxime,
Iván, Pirmin, Angelos, Torsten, Luí­s, Tom.

I have updated the Terms of Reference accordingly [1].

Thanks

..Tom

[1] https://wiki.osgeo.org/wiki/Standards_Committee#Membership