Bump vue from 3.5.18 to 3.5.21 in /web/siteplan (#1842)

Bumps [vue](https://github.com/vuejs/core) from 3.5.18 to 3.5.21.
- [Release notes](https://github.com/vuejs/core/releases)
- [Changelog](https://github.com/vuejs/core/blob/main/CHANGELOG.md)
- [Commits](vuejs/core@v3.5.18...v3.5.21)

---
updated-dependencies:
- dependency-name: vue
  dependency-version: 3.5.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

web/siteplan/package-lock.json

@@ -20,7 +20,7 @@
     "material-design-icons": "^3.0.1",
     "ol": "^10.6.1",
     "ol-mapbox-style": "^13.0.1",
-    "vue": "^3.5.18",
+    "vue": "^3.5.21",
     "vue-class-component": "^8.0.0-1",
     "vue-router": "^4.5.1",
     "vuex": "^4.1.0"