chore(deps): bump proj4 from 2.16.2 to 2.17.0 in /demo

Bumps [proj4](https://github.com/proj4js/proj4js) from 2.16.2 to 2.17.0.
- [Release notes](https://github.com/proj4js/proj4js/releases)
- [Changelog](https://github.com/proj4js/proj4js/blob/master/changelog.md)
- [Commits](proj4js/proj4js@v2.16.2...v2.17.0)

---
updated-dependencies:
- dependency-name: proj4
  dependency-version: 2.17.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

demo/package-lock.json

@@ -11,7 +11,7 @@
     "dexie": "4.0.11",
     "mapserver-wasm": "file:../",
     "ol": "10.5.0",
-    "proj4": "2.16.2"
+    "proj4": "2.17.0"
   },
   "devDependencies": {
     "vite": "6.3.5"