build(deps): bump leaflet and @types/leaflet in /frontend

Bumps [leaflet](https://github.com/Leaflet/Leaflet) and [@types/leaflet](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/leaflet). These dependencies needed to be updated together.

Updates `leaflet` from 1.7.1 to 1.9.4
- [Release notes](https://github.com/Leaflet/Leaflet/releases)
- [Changelog](https://github.com/Leaflet/Leaflet/blob/main/CHANGELOG.md)
- [Commits](Leaflet/Leaflet@v1.7.1...v1.9.4)

Updates `@types/leaflet` from 1.7.9 to 1.9.8
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/leaflet)

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

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

frontend/yarn.lock

@@ -3163,9 +3163,9 @@
     "@types/leaflet" "*"
 
 "@types/leaflet@*", "@types/leaflet@^1.7.9":
-  version "1.7.9"
-  resolved "https://registry.yarnpkg.com/@types/leaflet/-/leaflet-1.7.9.tgz#7993d34f14cfa88c45b3d490daba39a3a1be9a2b"
-  integrity sha512-H8vPgD49HKzqM41ArHGZM70g/tfhp8W+JcPxfnF+5H/Xvp+xiP+KQOUNWU8U89fqS1Jj3cpRY/+nbnaHFzwnFA==
+  version "1.9.8"
+  resolved "https://registry.yarnpkg.com/@types/leaflet/-/leaflet-1.9.8.tgz#32162a8eaf305c63267e99470b9603b5883e63e8"
+  integrity sha512-EXdsL4EhoUtGm2GC2ZYtXn+Fzc6pluVgagvo2VC1RHWToLGlTRwVYoDpqS/7QXa01rmDyBjJk3Catpf60VMkwg==
   dependencies:
     "@types/geojson" "*"
 
@@ -9543,9 +9543,9 @@ leaflet.markercluster@^1.4.1, leaflet.markercluster@^1.5.3:
   integrity sha512-vPTw/Bndq7eQHjLBVlWpnGeLa3t+3zGiuM7fJwCkiMFq+nmRuG3RI3f7f4N4TDX7T4NpbAXpR2+NTRSEGfCSeA==
 
 leaflet@^1.6.0, leaflet@^1.7.1:
-  version "1.7.1"
-  resolved "https://registry.yarnpkg.com/leaflet/-/leaflet-1.7.1.tgz#10d684916edfe1bf41d688a3b97127c0322a2a19"
-  integrity sha512-/xwPEBidtg69Q3HlqPdU3DnrXQOvQU/CCHA1tcDQVzOwm91YMYaILjNp7L4Eaw5Z4sOYdbBz6koWyibppd8Zqw==
+  version "1.9.4"
+  resolved "https://registry.yarnpkg.com/leaflet/-/leaflet-1.9.4.tgz#23fae724e282fa25745aff82ca4d394748db7d8d"
+  integrity sha512-nxS1ynzJOmOlHp+iL3FyWqK89GtNL8U8rvlMOsQdTTssxZwCXh8N2NB3GDQOL+YR3XnWyZAxwQixURb+FA74PA==
 
 lerna-audit@^1.3.3:
   version "1.3.3"