Update dependency langchain to ^0.0.149

Author: renovate[bot]

package.json

@@ -42,7 +42,7 @@
     "highlight.js": "^11.8.0",
     "htmx.org": "^1.9.5",
     "hyperscript.org": "^0.9.11",
-    "langchain": "^0.0.147",
+    "langchain": "^0.0.149",
     "notion-client": "^6.16.0",
     "pdf-parse": "^1.1.1",
     "pg": "^8.11.3",