update the detailed list of Deliverables

[siusin]

• the timeline of the joint deliverables should be in sync with the new charter of the DAS WG; /cc @himorin
• please feel free to update the milestone of the webapps specs;

[siusin]

preview -> https://htmlpreview.github.io/?https://github.com/w3c/webappswg/blob/1e68e6d836e91c67136ac1b08dc722f76ebae8ad/charter/draft-charter-2023.html#patentpolicy