[Snyk] Upgrade langchain from 0.0.156 to 0.2.6#351

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steve-hb wants to merge 1 commit intomasterfrom snyk-upgrade-652926969179029e8d39bfc595e23841

+289-354

Commits on Jul 13, 2024

fix: upgrade langchain from 0.0.156 to 0.2.6
snyk-bot
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