npm(deps): bump @mui/x-charts from 7.13.0 to 7.15.0

Bumps [@mui/x-charts](https://github.com/mui/mui-x/tree/HEAD/packages/x-charts) from 7.13.0 to 7.15.0.
- [Release notes](https://github.com/mui/mui-x/releases)
- [Changelog](https://github.com/mui/mui-x/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mui/mui-x/commits/v7.15.0/packages/x-charts)

---
updated-dependencies:
- dependency-name: "@mui/x-charts"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

package.json

@@ -56,7 +56,7 @@
     "dependencies": {
         "@biomejs/biome": "^1.8.3",
         "@mapbox/mapbox-sdk": "^0.16.0",
-        "@mui/x-charts": "^7.13.0",
+        "@mui/x-charts": "^7.15.0",
         "@techbychoice/tbc-component-library": "^0.0.7",
         "@tiptap/extension-heading": "^2.5.9",
         "@tiptap/extension-paragraph": "^2.6.6",