build: (deps): bump matrix from 1.1.1 to 2.0.1

Bumps [matrix](https://github.com/famedly/matrix-dart-sdk) from 1.1.1 to 2.0.1.
- [Release notes](https://github.com/famedly/matrix-dart-sdk/releases)
- [Changelog](https://github.com/famedly/matrix-dart-sdk/blob/v2.0.1/CHANGELOG.md)
- [Commits](https://github.com/famedly/matrix-dart-sdk/compare/v1.1.1...v2.0.1)

---
updated-dependencies:
- dependency-name: matrix
  dependency-version: 2.0.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

pubspec.yaml

@@ -53,7 +53,7 @@ dependencies:
   just_audio: ^0.10.5
   latlong2: ^0.9.1
   linkify: ^5.0.0
-  matrix: ^1.1.1
+  matrix: ^2.0.1
   mime: ^2.0.0
   native_imaging: ^0.2.0
   opus_caf_converter_dart: ^1.0.1