chore(deps): update postgres docker tag to v17.6 (#170)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| postgres | minor | `17.5-alpine` -> `17.6-alpine` |

---

This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
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Reviewed-on: #170
Co-authored-by: renovate-bot <renovate-bot@dubas.dev>
Co-committed-by: renovate-bot <renovate-bot@dubas.dev>

docker-compose.yml

@@ -3,7 +3,7 @@ name: ${EX_TRAINER_PROJECT_NAME:-ex_trainer}
 
 services:
   db:
-    image: 'postgres:17.5-alpine'
+    image: 'postgres:17.6-alpine'
     hostname: &db_host db
     init: true
     environment: