Release langchain-community==0.2.3

Changes since langchain-community==0.2.2

community[patch]: Release 0.2.3 (#22562)
community[patch]: improve test setup to accurately test filtering of labels in neo4j (#22531)
community[minor]: Add support for metadata indexing policy in Cassandra vector store (#22548)
community[minor]: add user agent for web scraping loaders (#22480)
community[minor]: Add native async support to SQLChatMessageHistory (#22065)
community[minor]: Improve InMemoryVectorStore with ability to persist to disk and filter on metadata. (#22186)
community[patch]: add detailed paragraph and example for BaichuanTextEmbeddings (#22031)
community[minor]: Added filter search for LanceDB (#22461)
community: fix huggingface deprecations (#22522)
community[minor]: Vectara Integration Update - Streaming, FCS, Chat, updates to documentation and example notebooks (#21334)