chore(deps): update dependency @types/pg to v8.15.6

Author: renovate[bot]

templates/basic-ts/package.json

@@ -27,7 +27,7 @@
     "typescript": "^5.8.3"
   },
   "overrides": {
-    "@types/pg": "8.15.1"
+    "@types/pg": "8.15.6"
   },
   "engines": {
     "node": ">= 18"