feat(spec): Update A2A types from specification 🤖#346

a2a-bot wants to merge 2 commits intomaina2aproject/a2a-python:mainfrom

auto-update-a2a-types-e834347c279186d9d7873b352298e8b19737dd5aa2aproject/a2a-python:auto-update-a2a-types-e834347c279186d9d7873b352298e8b19737dd5aCopy head branch name to clipboard