Update PG_VERSION to 15.3

[smorimoto]

As the title says!

[davissp14]

@smorimoto Thanks for the PR! We will also need to update the CI workflow to point to the new version:
https://github.com/fly-apps/postgres-flex/blob/master/.github/workflows/ci.yaml#L35-L63

[smorimoto]

@davissp14 I'm complaining that my grep wouldn't have caught it! 😵‍💫 I believe I corrected it! 🙂

[davissp14]

@smorimoto It's close! There's a few more references to update in that ci file.

postgres-flex/.github/workflows/ci.yaml

Lines 48 to 63 in 9d5b688

	flyio/postgres-flex:15.2
	-
	name: Build and push Postgres 15 Timescale DB
	id: docker_build_15_timescaledb
	uses: docker/build-push-action@v3
	with:
	build-args: |
	PG_VERSION=15.2
	PG_MAJOR_VERSION=15
	VERSION=${{ steps.get-latest-tag.outputs.tag }}
	context: .
	file: ./Dockerfile-timescaledb
	push: true
	tags: |
	flyio/postgres-flex-timescaledb:15
	flyio/postgres-flex-timescaledb:15.2

[smorimoto]

Ooooops 🤯 Eye-grep was not better!

[davissp14]

Looks great, thank you!

[smorimoto]

Likewise!