Update OpenProcessing curation link

[Qianqian Ye]

Here is the final OpenProcessing curation organized by curator Zainab Aliyu:
https://openprocessing.org/curation/87649

Please update the current placeholder OP curation to the final curation. Thanks @outofambit @stalgiag

[Qianqian Ye]

nvm, I see that it's updated. thanks!