Bump mobx from 2.5.0 to 2.6.0

Bumps [mobx](https://github.com/mobxjs/mobx.dart) from 2.5.0 to 2.6.0.
- [Release notes](https://github.com/mobxjs/mobx.dart/releases)
- [Changelog](https://github.com/mobxjs/mobx.dart/blob/main/CHANGELOG.md)
- [Commits](https://github.com/mobxjs/mobx.dart/compare/mobx-2.5.0...mobx-2.6.0)

---
updated-dependencies:
- dependency-name: mobx
  dependency-version: 2.6.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

pubspec.lock

@@ -772,10 +772,10 @@ packages:
     dependency: "direct main"
     description:
       name: mobx
-      sha256: bf1a90e5bcfd2851fc6984e20eef69557c65d9e4d0a88f5be4cf72c9819ce6b0
+      sha256: "25ea9a3ee69243d578fb6288721d8eeb18550d0391c32f896d377d994154bff2"
       url: "https://pub.dev"
     source: hosted
-    version: "2.5.0"
+    version: "2.6.0"
   mobx_codegen:
     dependency: "direct dev"
     description:

pubspec.yaml

@@ -42,7 +42,7 @@ dependencies:
     cached_network_image: ^3.1.0
     webview_flutter: ^4.2.0
     provider: ^6.0.1
-    mobx: ^2.0.7+4
+    mobx: ^2.6.0
     flutter_mobx: ^2.0.0
     shared_preferences: ^2.0.8
     flutter_svg: ^2.0.5