docs: update Cloudflare Workers instructions

[Cherry]

With Cloudflare Workers, node_compat is an old paradigm that injects a lot of things into the global namespace that aren't necessary here, and existed before Cloudflare had more native support for Node.js APIs.

nodejs_compat is much more modern and Cloudflare's solution for actually using Node.js modules, and what this library uses when it imports from things like node:events, etc.

The tests referenced for the Cloudflare implementation here also use nodejs_compat, not node_compat:

postgres/cf/test.js

Line 2 in 6f20a48

// npx wrangler@latest pages dev ./cf --script-path test.js --compatibility-date=2023-06-20 --log-level=debug --compatibility-flag=nodejs_compat

I've tested with many of my own projects, and only nodejs_compat is needed. You in fact can't use both the older node_compat and newer nodejs_compat, so I would recommend encouraging use of the newer paradigm here.