ollama: bump core (#31929)

Author: mdrxy

libs/partners/ollama/pyproject.toml

@@ -8,7 +8,7 @@ license = { text = "MIT" }
 requires-python = ">=3.9"
 dependencies = [
     "ollama>=0.5.1,<1.0.0",
-    "langchain-core<1.0.0,>=0.3.66",
+    "langchain-core<1.0.0,>=0.3.68",
 ]
 name = "langchain-ollama"
 version = "0.3.4"