langchain

60c837c5 - Fix WhatsAppChatLoader regex pattern for 24 hour time format (#2458)

Fix WhatsAppChatLoader regex pattern for 24 hour time format (#2458) Fix for 24 hour time format bug. Now whatsapp regex is able to parse either 12 or 24 hours time format. Linked [issue](https://github.com/hwchase17/langchain/issues/2457).