chore: bump matrix sdk

Signed-off-by: TheOneWithTheBraid <the-one@with-the-braid.cf>

pubspec.lock

@@ -941,12 +941,10 @@ packages:
   matrix:
     dependency: "direct main"
     description:
-      path: "."
-      ref: "krille/remove-transaction-workaround"
-      resolved-ref: "4643b75391f7252d5f416646d113892acd3d0964"
-      url: "https://gitlab.com/famedly/company/frontend/famedlysdk.git"
-    source: git
-    version: "0.15.9"
+      name: matrix
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.15.11"
   matrix_api_lite:
     dependency: transitive
     description:

pubspec.yaml

@@ -59,7 +59,7 @@ dependencies:
   just_audio: ^0.9.20
   keyboard_shortcuts: ^0.1.4
   latlong2: ^0.8.1
-  matrix: ^0.15.9
+  matrix: ^0.15.11
   matrix_homeserver_recommendations: ^0.3.0
   matrix_link_text: ^1.0.2
   native_imaging: ^0.1.0
@@ -161,7 +161,3 @@ dependency_overrides:
     git:
       url: https://github.com/TheOneWithTheBraid/keyboard_shortcuts.git
       ref: null-safety
-  matrix:
-    git:
-      url: https://gitlab.com/famedly/company/frontend/famedlysdk.git
-      ref: krille/remove-transaction-workaround