[Radioig] RadioIG news

[BONNAREL FRANCOIS]

Dear all,

   -  The radio IG session page has now been completed with all slides 
and links to notes and joint sessions. 
https://wiki.ivoa.net/twiki/bin/view/IVOA/InterOpMay2021RIG. Thanks to 
all speakers and note takers !!!

   - The Implementation note draft is now available on github 
(https://github.com/ivoa/RadioVOImplementation) in addition to the IVOA 
document repository 
(https://www.ivoa.net/documents/Notes/RadioVOImp/20210521/index.html ).

     please write issues and PR !!!

Cheers

François (with Mark Lacy)