github langchain-ai/langchain langchain-anthropic==0.3.11

Changes since langchain-anthropic==0.3.10

anthropic: release 0.3.11 (#30857)
multiple: multi-modal content blocks (#30746)
partners[lint]: run pyupgrade to get code in line with 3.9 standards (#30781)
infra: handle flaky tests (#30501)

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