Bump next to ^15.5.6 (#47091)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

docs/package.json

@@ -77,7 +77,7 @@
     "lz-string": "^1.5.0",
     "markdown-to-jsx": "^7.7.15",
     "material-ui-popup-state": "^5.3.6",
-    "next": "^15.5.4",
+    "next": "^15.5.6",
     "notistack": "3.0.2",
     "nprogress": "^0.2.0",
     "postcss": "^8.5.6",

packages/mui-docs/package.json

@@ -41,7 +41,7 @@
     "@types/node": "^20.19.22",
     "@types/prop-types": "^15.7.15",
     "@types/react": "^19.2.2",
-    "next": "^15.5.4",
+    "next": "^15.5.6",
     "react": "^19.2.0"
   },
   "peerDependencies": {

packages/mui-joy/package.json

@@ -50,7 +50,7 @@
     "chai": "^6.0.1",
     "es-toolkit": "^1.39.10",
     "fast-glob": "^3.3.3",
-    "next": "^15.5.4",
+    "next": "^15.5.6",
     "react": "^19.2.0",
     "react-dom": "^19.2.0",
     "sinon": "^21.0.0"

packages/mui-material-nextjs/package.json

@@ -37,7 +37,7 @@
     "@emotion/react": "^11.14.0",
     "@emotion/server": "^11.11.0",
     "@types/react": "^19.2.2",
-    "next": "^15.5.4",
+    "next": "^15.5.6",
     "react": "^19.2.0"
   },
   "peerDependencies": {