change versions of langchain and langchain/core to fix vulnerabilities

Author: Chahat chugh

package-lock.json

@@ -127,13 +127,13 @@
   },
   "dependencies": {
     "@langchain/community": "^0.3.50",
-    "@langchain/core": "^0.3.75",
+    "@langchain/core": "^0.3.80",
     "@langchain/langgraph": "^0.4.4",
     "@loopback/repository": "^7.0.14",
     "@sourceloop/chat-service": "15.0.3",
     "@sourceloop/core": "17.0.3",
     "@sourceloop/file-utils": "0.3.7",
-    "langchain": "^0.3.30",
+    "langchain": "^0.3.37",
     "loopback4-authentication": "^12.2.0",
     "loopback4-authorization": "^7.0.3",
     "tslib": "^2.8.0",