chore(deps): update actions/setup-node action to v6

.gitea/workflows/check.yml

@@ -19,7 +19,7 @@ jobs:
         uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4
 
       - name: Setup Node.js
-        uses: actions/setup-node@a0853c24544627f65ddf259abe73b1d18a591444 # v5
+        uses: actions/setup-node@2028fbc5c25fe9cf00d9f06a71cc4710d4507903 # v6
         with:
           node-version: 22
           cache: "pnpm"

package.json

@@ -24,7 +24,7 @@
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "lucide-react": "^0.552.0",
-    "next": "^16.0.0",
+    "next": "^15.4.1",
     "next-plausible": "^3.12.4",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
@@ -40,7 +40,7 @@
     "@types/react": "19.2.2",
     "@types/react-dom": "19.2.2",
     "eslint": "9.39.0",
-    "eslint-config-next": "16.0.1",
+    "eslint-config-next": "15.5.6",
     "eslint-plugin-react-hooks": "5.2.0",
     "postcss": "8.5.6",
     "prettier": "3.6.2",