fix(deps): update dependency next to v16.2.6 [security]

Author: renovate[bot]

packages/sdk/react/contract-tests/package.json

@@ -14,7 +14,7 @@
   "dependencies": {
     "@launchdarkly/js-contract-test-utils": "workspace:^",
     "@launchdarkly/react-sdk": "workspace:^",
-    "next": "16.2.3",
+    "next": "16.2.6",
     "react": "19.2.3",
     "react-dom": "19.2.3"
   },