chore(deps): bump the nextjs group across 1 directory with 3 updates

Bumps the nextjs group with 3 updates in the / directory: [@next/third-parties](https://github.com/vercel/next.js/tree/HEAD/packages/third-parties), [eslint-config-next](https://github.com/vercel/next.js/tree/HEAD/packages/eslint-config-next) and [next](https://github.com/vercel/next.js).


Updates `@next/third-parties` from 14.2.15 to 15.0.3
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](https://github.com/vercel/next.js/commits/v15.0.3/packages/third-parties)

Updates `eslint-config-next` from 14.2.15 to 15.0.3
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](https://github.com/vercel/next.js/commits/v15.0.3/packages/eslint-config-next)

Updates `next` from 14.2.15 to 15.0.3
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](https://github.com/vercel/next.js/compare/v14.2.15...v15.0.3)

---
updated-dependencies:
- dependency-name: "@next/third-parties"
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: nextjs
- dependency-name: eslint-config-next
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: nextjs
- dependency-name: next
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: nextjs
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -80,7 +80,7 @@
     "@grpc/grpc-js": "1.12.2",
     "@leeoniya/ufuzzy": "^1.0.14",
     "@mozilla/glean": "^5.0.3",
-    "@next/third-parties": "^14.2.15",
+    "@next/third-parties": "^15.0.3",
     "@sentry/nextjs": "^8.37.1",
     "@sentry/node": "^8.0.0",
     "@sentry/utils": "^8.0.0",
@@ -91,14 +91,14 @@
     "@types/react-dom": "^18.3.1",
     "canvas-confetti": "^1.9.3",
     "dotenv-flow": "^4.1.0",
-    "eslint-config-next": "^14.2.15",
+    "eslint-config-next": "^15.0.3",
     "ioredis": "^5.4.1",
     "jsdom": "^25.0.1",
     "jsonwebtoken": "^9.0.2",
     "jwk-to-pem": "^2.0.6",
     "knex": "^3.1.0",
     "mjml": "^4.15.3",
-    "next": "^14.2.15",
+    "next": "^15.0.3",
     "next-auth": "^4.24.10",
     "nodemailer": "^6.9.16",
     "pg": "^8.13.1",