chore(langchain): also bump text splitters (#32722)

Author: sydney-runkle

libs/langchain_v1/pyproject.toml

@@ -8,7 +8,7 @@ license = { text = "MIT" }
 requires-python = ">=3.10"
 dependencies = [
     "langchain-core<1.0.0,>=0.3.75",
-    "langchain-text-splitters<1.0.0,>=0.3.8",
+    "langchain-text-splitters<1.0.0,>=0.3.9",
     "langgraph>=0.6.0",
     "pydantic>=2.7.4",
 ]