docs: missing semicolons

[mattikl]

I noticed some missing semicolons in https://node-postgres.com/features/pooling:

(async () => {

These lines need a semicolon before them, otherwise they get parsed as a function invocation on the previous line. This causes errors that might be very confusing for someone trying to learn the topics.

Btw, great job on the docs!

[langpavel]

automatic semicolon insertion is heavy… oh… don't worry, this can be a mistake of human who write the doc. Or not… be clever and don't copy what you see, rethink every word and hit your pleasure 😈