[Marketing] osgeo one-page updated with 2023 sponsors for foss4gna

[Jody Garnett]

There is a pull request here https://github.com/OSGeo/osgeo/pull/244 to
prep content for foss4gna printing.

I reached out via social media to sponsors who did not provide a media pack
with high quality logos:

   - https://x.com/jodygarnett/status/1707916972007268503?s=20
   - https://x.com/jodygarnett/status/1707915682279718936?s=20
   - https://fosstodon.org/@jodygarnett/111151259986595976#.


Good publicity since we need to communicate anyways.
--
Jody Garnett
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