Update to specification from 525ff38e5fe2a118f5be5d25189708b590616dd4#619

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auto-update-a2a-types-525ff38e5fe2a118f5be5d25189708b590616dd4a2aproject/a2a-python:auto-update-a2a-types-525ff38e5fe2a118f5be5d25189708b590616dd4Copy head branch name to clipboard