Chore(deps-dev): Bump @types/leaflet from 1.9.12 to 1.9.15

Bumps [@types/leaflet](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/leaflet) from 1.9.12 to 1.9.15.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/leaflet)

---
updated-dependencies:
- dependency-name: "@types/leaflet"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package-lock.json

@@ -82,6 +82,6 @@
     "@nextcloud/eslint-config": "^8.4.1",
     "@nextcloud/stylelint-config": "^3.0.1",
     "@nextcloud/webpack-vue-config": "^6.0.1",
-    "@types/leaflet": "^1.9.12"
+    "@types/leaflet": "^1.9.15"
   }
 }