fix: ragas - pin langchain-community to avoid ModuleNotFoundError

Author: anakin87

integrations/ragas/pyproject.toml

@@ -23,7 +23,9 @@ classifiers = [
   "Programming Language :: Python :: Implementation :: CPython",
   "Programming Language :: Python :: Implementation :: PyPy",
 ]
-dependencies = ["haystack-ai>=2.22.0", "ragas>=0.4.3"]
+
+# langchain-community pinned due to https://github.com/vibrantlabsai/ragas/issues/2741
+dependencies = ["haystack-ai>=2.22.0", "ragas>=0.4.3", "langchain-community<0.4.2"]
 
 [project.urls]
 Source = "https://github.com/deepset-ai/haystack-core-integrations/tree/main/integrations/ragas"