fix: update tidb client (#5967)

Fixes [driver-adapters (tidb-node-basic, library,
ubuntu-22.04)](https://github.com/prisma/ecosystem-tests/actions/runs/15710927504/job/44268541102#logs)

Author: jacek-prisma

driver-adapters/tidb-node-basic/package.json

@@ -12,7 +12,7 @@
   },
   "dependencies": {
     "@prisma/client": "6.10.0-dev.29",
-    "@tidbcloud/prisma-adapter": "git://github.com/jacek-prisma/tidbcloud-prisma-adapter#8559ec7",
+    "@tidbcloud/prisma-adapter": "git://github.com/jacek-prisma/tidbcloud-prisma-adapter#787abe9",
     "@tidbcloud/serverless": "0.2.0"
   }
 }