Bump @next/env from 14.2.13 to 15.3.1

Bumps [@next/env](https://github.com/vercel/next.js/tree/HEAD/packages/next-env) from 14.2.13 to 15.3.1.
- [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/v15.3.1/packages/next-env)

---
updated-dependencies:
- dependency-name: "@next/env"
  dependency-version: 15.3.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -18,7 +18,7 @@
   },
   "dependencies": {
     "@fortawesome/fontawesome-svg-core": "^6.6.0",
-    "@next/env": "^14.2.6",
+    "@next/env": "^15.3.1",
     "@patternfly/react-core": "^5.4.0",
     "@patternfly/react-icons": "^6.2.2",
     "@patternfly/react-styles": "^5.3.1",