chore(deps): bump supabase/postgres from 15.8.1.054 to 15.8.1.056 in /pkg/config/templates (#3323)

chore(deps): bump supabase/postgres in /pkg/config/templates

Bumps supabase/postgres from 15.8.1.054 to 15.8.1.056.

---
updated-dependencies:
- dependency-name: supabase/postgres
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pkg/config/templates/Dockerfile

@@ -1,5 +1,5 @@
 # Exposed for updates by .github/dependabot.yml
-FROM supabase/postgres:15.8.1.054 AS pg15
+FROM supabase/postgres:15.8.1.056 AS pg15
 # Append to ServiceImages when adding new dependencies below
 FROM library/kong:2.8.1 AS kong
 FROM axllent/mailpit:v1.22.3 AS mailpit