fix: upgrade langchain from 0.0.96 to 0.2.8

Snyk has created this PR to upgrade langchain from 0.0.96 to 0.2.8.

See this package in npm:
langchain

See this project in Snyk:
https://app.snyk.io/org/abdulrahman305/project/5f03e871-124a-483c-8937-a2cff02be0ca?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

package.json

@@ -17,7 +17,7 @@
     "@supabase/supabase-js": "^2.24.0",
     "bottleneck": "^2.19.5",
     "cheerio": "^1.0.0-rc.12",
-    "langchain": "^0.2.5",
+    "langchain": "^0.2.8",
     "next": "13.1.6",
     "node-spider": "^1.4.1",
     "react": "18.3.1",