Fix langchain-nvidia git repo (#315)

Author: cbornet

ragstack-e2e-tests/pyproject.langchain.toml

@@ -32,7 +32,7 @@ langchain_community = { git = "https://github.com/langchain-ai/langchain.git", b
 langchain-openai = { git = "https://github.com/langchain-ai/langchain.git", branch = "master", subdirectory = "libs/partners/openai" }
 langchain-google-genai = { git = "https://github.com/langchain-ai/langchain-google.git", branch = "main", subdirectory = "libs/genai" }
 langchain-google-vertexai = { git = "https://github.com/langchain-ai/langchain-google.git", branch = "main", subdirectory = "libs/vertexai" }
-langchain-nvidia-ai-endpoints = { git = "https://github.com/langchain-ai/langchain.git", branch = "master", subdirectory = "libs/partners/nvidia-ai-endpoints" }
+langchain-nvidia-ai-endpoints = { git = "https://github.com/langchain-ai/langchain-nvidia.git", branch = "main", subdirectory = "libs/ai-endpoints" }
 llama-index = { version = "0.9.48", extras = ["langchain"] }
 llama-parse = { version = "0.1.4" }
 astrapy = "~0.7.0"