Use nemoguardrails HEAD for ragstack-ai e2e tests (#496)

Author: cbornet

libs/e2e-tests/pyproject.ragstack-ai.toml

@@ -19,9 +19,12 @@ azure-storage-blob = "^12.19.0"
 pillow = "^10.2.0"
 python-dotenv = "^1.0.1"
 trulens-eval = "^0.31.0"
-nemoguardrails = "^0.8.0"
 langchainhub = "^0.1.15"
 
+# Temporarily use nemoguardrails HEAD to get https://github.com/NVIDIA/NeMo-Guardrails/pull/551
+# nemoguardrails = "^0.8.0"
+nemoguardrails = { git = "https://github.com/NVIDIA/NeMo-Guardrails.git", branch = "develop" }
+
 # From LangChain optional deps, needed by WebBaseLoader
 beautifulsoup4 = "^4"