correct github repository (#6026)

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Co-authored-by: Mirna Wong <[email protected]>

website/docs/docs/core/connect-data-platform/postgres-setup.md

@@ -5,7 +5,7 @@ id: "postgres-setup"
 meta:
   maintained_by: dbt Labs
   authors: 'core dbt maintainers'
-  github_repo: 'dbt-labs/dbt-core'
+  github_repo: 'dbt-labs/dbt-postgres'
   pypi_package: 'dbt-postgres'
   min_core_version: 'v0.4.0'
   cloud_support: Supported