chore: update dependency pg to ^8.13.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
pg (source)	^8.12.0 -> ^8.13.1

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Release Notes

brianc/node-postgres (pg)

### [`v8.13.1`](https://redirect.github.com/brianc/node-postgres/compare/pg@8.13.0...pg@8.13.1) [Compare Source](https://redirect.github.com/brianc/node-postgres/compare/pg@8.13.0...pg@8.13.1) ### [`v8.13.0`](https://redirect.github.com/brianc/node-postgres/compare/pg@8.12.0...pg@8.13.0) [Compare Source](https://redirect.github.com/brianc/node-postgres/compare/pg@8.12.0...pg@8.13.0)

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