fix(deps): update dependency pg to v8.15.6 (#1118)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

backend/package.json

@@ -47,7 +47,7 @@
     "drizzle-zod": "0.7.1",
     "http-signature": "1.4.0",
     "nestjs-pino": "4.4.0",
-    "pg": "8.15.5",
+    "pg": "8.15.6",
     "reflect-metadata": "0.2.2",
     "rxjs": "7.8.2",
     "zod": "3.24.3"