add MetaCRiSP workshop

[mu00d8]

Workshop's co-located with IEEE S&P and all criteria apply:

• ✅ Is there a "Call For Papers"? Is there a link for submissions? Are there formatting guidelines (page limits, style guide) etc?
• ✅ Is security, privacy, or cryptography mentioned in the list of topics?
• ✅ Is there a review process? Does the website name a general chair, program chair, or program committee?
• ✅ If accepted, will the paper be published in a proceedings?

[clementfung]

Looks good, thanks for sharing!