Update 2024-10-16-agenda - Post Quantum Workshop (#663)

meetings/2024/2024-10-16-agenda.md

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 *   [Realms-Initialization-Control](https://github.com/WICG/Realms-Initialization-Control): @weizman suggested a followup to [our TPAC discussion](https://github.com/w3c/webappsec/blob/main/meetings/2024/2024-09-26-TPAC-minutes.md#realms-initialization-control) to get more feedback on the proposal and dig into [inheritance](https://github.com/WICG/Realms-Initialization-Control/issues/10) specifically.
 
+* [Post Quantum Cryptography for XML Signature and XML Encryption Suites](https://github.com/w3c/strategy/issues/484): During IETF 121, we discussed Post Quantum on XML, and we're thinking of having a workshop. Is it the case to include Web Crypto in the workshop? (@simoneonofri)
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 If you would like to add an item to the agenda, please open a PR against [this document](https://github.com/w3c/webappsec/new/main/meetings/2024/2024-10-16-agenda.md)
 
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