fix: apps/web/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-NEXT-15104645
- https://snyk.io/vuln/SNYK-JS-NEXT-15105315

Author: snyk-bot

apps/web/package.json

@@ -33,7 +33,7 @@
     "mdast-util-to-string": "^4.0.0",
     "mdx-annotations": "^0.1.4",
     "motion": "^12.23.12",
-    "next": "^16.0.0",
+    "next": "^16.1.5",
     "next-themes": "^0.4.6",
     "react": "catalog:react19",
     "react-dom": "catalog:react19",