[Openid-specs-risc] [openid/sharedsignals] a2fe37: #46 add stream exists behavior (#50)

[Tim Cappalli]

  Branch: refs/heads/main
  Home:   https://github.com/openid/sharedsignals
  Commit: a2fe379db604c9fcfc98d6da4b3dbe344e140b0f
      https://github.com/openid/sharedsignals/commit/a2fe379db604c9fcfc98d6da4b3dbe344e140b0f
  Author: Tim Cappalli <tim at cloudauth.dev>
  Date:   2023-09-22 (Fri, 22 Sep 2023)

  Changed paths:
    M openid-sharedsignals-framework-1_0.md

  Log Message:
  -----------
  #46 add stream exists behavior (#50)

* #46 add stream exists behavior

* incorporates Atul and Shane's feedback

* remove txt and html

* update stream exists to 409

* Added 409 error description in the table

Added error description in the table

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Co-authored-by: Apoorva Deshpande <apps.desh at gmail.com>