Fix Dependabot alerts for guardrails (#1964)

* Fix guardrails issue

Signed-off-by: ZePan110 <ze.pan@intel.com>

* Revert Xgrammer

Signed-off-by: ZePan110 <ze.pan@intel.com>

* Revert vllm change

Signed-off-by: ZePan110 <ze.pan@intel.com>

* Test

Signed-off-by: ZePan110 <ze.pan@intel.com>

* Test

Signed-off-by: ZePan110 <ze.pan@intel.com>

* Fix

Signed-off-by: ZePan110 <ze.pan@intel.com>

* Fix 2

Signed-off-by: ZePan110 <ze.pan@intel.com>

* Fix 3

Signed-off-by: ZePan110 <ze.pan@intel.com>

* Fix langchain issue

Signed-off-by: ZePan110 <ze.pan@intel.com>

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Signed-off-by: ZePan110 <ze.pan@intel.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: ZePan110

comps/guardrails/src/hallucination_detection/integrations/hallucination_guard.py

@@ -7,8 +7,8 @@
 import aiohttp
 import requests
 from fastapi.responses import StreamingResponse
-from langchain.schema import HumanMessage, SystemMessage
 from langchain_community.llms import VLLMOpenAI
+from langchain_core.messages import HumanMessage, SystemMessage
 from langchain_core.prompts import ChatPromptTemplate, PromptTemplate
 
 from comps import (