Bump drizzle version (browserbase#1981)

# why

# what changed

# test plan


<!-- This is an auto-generated description by cubic. -->
---
## Summary by cubic
Bumped `drizzle-orm` to `1.0.0-beta.20` to patch a security
vulnerability in `server-v4`. Addresses Linear STG-1801.

<sup>Written for commit 76ec8a0.
Summary will update on new commits. <a
href="https://cubic.dev/pr/browserbase/stagehand/pull/1981">Review in
cubic</a></sup>

<!-- End of auto-generated description by cubic. -->

Author: miguelg719

packages/server-v4/package.json

@@ -33,7 +33,7 @@
     "@fastify/swagger": "^9.6.1",
     "@fastify/swagger-ui": "^5.2.3",
     "@t3-oss/env-core": "^0.13.11",
-    "drizzle-orm": "1.0.0-beta.19",
+    "drizzle-orm": "1.0.0-beta.20",
     "fastify": "^5.3.2",
     "fastify-metrics": "^12.1.0",
     "fastify-plugin": "^4.5.1",