Upgrade next-js version in ssr-test-app (#2773)

* Upgrade next-js version

* Upgrade es-lint plugin

Author: jekloudaMSFT

apps/ssr-test-app/package.json

@@ -8,7 +8,7 @@
     "start": "next start"
   },
   "dependencies": {
-    "next": "^15.1.6",
+    "next": "^15.2.3",
     "react": "^18.2.0",
     "react-dom": "^18.2.0"
   },

package.json

@@ -41,7 +41,7 @@
     "@babel/runtime": "^7.24.4",
     "@microsoft/eslint-plugin-sdl": "^0.2.2",
     "@mixer/webpack-bundle-compare": "^0.1.1",
-    "@next/eslint-plugin-next": "^15.1.6",
+    "@next/eslint-plugin-next": "^15.2.3",
     "@octokit/core": "^3.6.0",
     "@rollup/plugin-commonjs": "^26.0.1",
     "@rollup/plugin-json": "^6.1.0",