Bump langchain

Bumps the pip group with 1 update in the /tools/sdk-ai-bots/Embeddings directory: [langchain](https://github.com/langchain-ai/langchain).


Updates `langchain` from 0.2.10 to 0.3.0
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](https://github.com/langchain-ai/langchain/compare/langchain==0.2.10...langchain==0.3.0)

---
updated-dependencies:
- dependency-name: langchain
  dependency-type: direct:production
  dependency-group: pip
...

Signed-off-by: dependabot[bot] <support@github.com>

tools/sdk-ai-bots/Embeddings/requirements.txt

@@ -1,6 +1,6 @@
 azure-identity==1.16.1
 azure-search-documents==11.6.0b2
-langchain==0.2.10
+langchain==0.3.0
 openai==0.27.8
 tiktoken==0.4.0
 python-dotenv==0.19.1