build: (deps): bump flutter_map from 6.2.1 to 8.1.1

Bumps [flutter_map](https://github.com/fleaflet/flutter_map) from 6.2.1 to 8.1.1.
- [Release notes](https://github.com/fleaflet/flutter_map/releases)
- [Changelog](https://github.com/fleaflet/flutter_map/blob/master/CHANGELOG.md)
- [Commits](https://github.com/fleaflet/flutter_map/commits/v8.1.1)

---
updated-dependencies:
- dependency-name: flutter_map
  dependency-version: 8.1.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

pubspec.lock

@@ -286,6 +286,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.0.8"
+  dart_earcut:
+    dependency: transitive
+    description:
+      name: dart_earcut
+      sha256: e485001bfc05dcbc437d7bfb666316182e3522d4c3f9668048e004d0eb2ce43b
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.0"
   dart_webrtc:
     dependency: transitive
     description:
@@ -601,10 +609,10 @@ packages:
     dependency: "direct main"
     description:
       name: flutter_map
-      sha256: "87cc8349b8fa5dccda5af50018c7374b6645334a0d680931c1fe11bce88fa5bb"
+      sha256: f7d0379477274f323c3f3bc12d369a2b42eb86d1e7bd2970ae1ea3cff782449a
       url: "https://pub.dev"
     source: hosted
-    version: "6.2.1"
+    version: "8.1.1"
   flutter_native_splash:
     dependency: "direct dev"
     description:

pubspec.yaml

@@ -34,7 +34,7 @@ dependencies:
   flutter_local_notifications: ^19.2.1
   flutter_localizations:
     sdk: flutter
-  flutter_map: ^6.1.0
+  flutter_map: ^8.1.1
   flutter_new_badger: ^1.1.1
   flutter_openssl_crypto: ^0.5.0
   flutter_secure_storage: ^9.2.4