llm: update langchain overrides

Author: haraldschilly

src/packages/package.json

@@ -23,8 +23,8 @@
       "undici@<5.28.3": "^5.28.4",
       "postcss@<8.4.31": "^8.4.31",
       "retry-request@<7.0.1": "^7.0.2",
-      "@langchain/core": "^0.3.46",
-      "langchain": "^0.3.11",
+      "@langchain/core": "^0.3.68",
+      "langchain": "^0.3.30",
       "katex@<0.16.9": "^0.16.10",
       "nanoid@<3.3.8": "^3.3.8",
       "[email protected]": "2.1.3",