[SAC] SAC 2023 Budget

[Regina Obe]

I've filled out what I consider to be expected needs for 2023 SAC budget.
And added the link to
https://wiki.osgeo.org/wiki/OSGeo_Budget_2023#OSGeo_Committees


I also filled out our actual expenses to the best of my knowledge for 2022
SAC expenditures.

Fill free to update these as needed:
https://wiki.osgeo.org/wiki/SAC:Budget#2023

Thanks,
Regina