chore(deps): update dependency @urql/core to v6

Author: renovate[bot]

packages/urql/package.json

@@ -51,7 +51,7 @@
   },
   "peerDependencies": {
     "graphql": "^15.2.0 || ^16.0.0",
-    "@urql/core": "^2.4.0 || ^3.0.0 || ^4.0.0 || ^5.0.0"
+    "@urql/core": "^2.4.0 || ^3.0.0 || ^4.0.0 || ^5.0.0 || ^6.0.0"
   },
   "type": "module",
   "engines": {