chore(deps): bump postgres from 16.2 to 16.3

Bumps postgres from 16.2 to 16.3.

---
updated-dependencies:
- dependency-name: postgres
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Dockerfile

@@ -1 +1 @@
-FROM postgres:16.2
+FROM postgres:16.3