build(deps): bump the npm_and_yarn group across 2 directories with 1 update

Bumps the npm_and_yarn group with 1 update in the /apps/dashboard directory: [next](https://github.com/vercel/next.js).
Bumps the npm_and_yarn group with 1 update in the /apps/frontend directory: [next](https://github.com/vercel/next.js).


Updates `next` from 15.3.6 to 15.5.18
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.3.6...v15.5.18)

Updates `next` from 15.3.6 to 15.5.18
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.3.6...v15.5.18)

Updates `next` from 16.2.4 to 16.2.6
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.3.6...v15.5.18)

Updates `next` from 16.2.4 to 16.2.6
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.3.6...v15.5.18)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 15.5.18
  dependency-type: direct:production
- dependency-name: next
  dependency-version: 16.2.6
  dependency-type: direct:production
...

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

Author: dependabot[bot]

apps/dashboard/package.json

@@ -54,7 +54,7 @@
 		"mapbox-gl-style-switcher": "^1.0.11",
 		"moment": "^2.30.1",
 		"moment-timezone": "^0.5.45",
-		"next": "15.3.6",
+		"next": "15.5.18",
 		"next-auth": "^4.24.7",
 		"next-transpile-modules": "^10.0.1",
 		"react": "19.1.0",

apps/frontend/package.json

@@ -31,7 +31,7 @@
 		"lottie-react": "^2.4.1",
 		"maplibre-gl": "^5.18.0",
 		"motion": "^12.6.5",
-		"next": "16.2.4",
+		"next": "16.2.6",
 		"next-intl": "^4.3.5",
 		"react": "19.2.5",
 		"react-country-flag": "^3.1.0",