fix(deps): update nextjs monorepo to ^15.5.6

Author: renovate[bot]

apps/frontend/package.json

@@ -37,7 +37,7 @@
         "dotenv-cli": "^10.0.0",
         "formik": "^2.4.6",
         "markdown-to-jsx": "^7.7.15",
-        "next": "^15.5.5",
+        "next": "^15.5.6",
         "next-auth": "^5.0.0-beta.29",
         "next-compose-plugins": "^2.2.1",
         "next-intl": "^4.3.12",
@@ -57,7 +57,7 @@
         "@dxp/eslint-config": "*",
         "@dxp/prettier-config": "*",
         "@dxp/typescript-config": "*",
-        "@next/bundle-analyzer": "^15.5.5",
+        "@next/bundle-analyzer": "^15.5.6",
         "@svgr/webpack": "^8.1.0",
         "@trivago/prettier-plugin-sort-imports": "^5.2.2",
         "@turbo/gen": "^2.5.8",
@@ -69,7 +69,7 @@
         "@types/throttle-debounce": "^5.0.2",
         "dotenv": "^17.2.3",
         "eslint": "^9.37.0",
-        "eslint-config-next": "^15.5.5",
+        "eslint-config-next": "^15.5.6",
         "postcss": "^8.5.6",
         "prettier": "^3.6.2",
         "sass": "^1.93.2",