build: Use matrix sdk main branch

pubspec.lock

@@ -1210,8 +1210,8 @@ packages:
     dependency: "direct main"
     description:
       path: "."
-      ref: "krille/store-upload-inbound-sessions-in-que"
-      resolved-ref: "97d544ba85fe3f832f639c9e4662734f6b0e5bd6"
+      ref: HEAD
+      resolved-ref: fe637e1627039623bb15c59f9a152f5d906bb48e
       url: "https://github.com/famedly/matrix-dart-sdk.git"
     source: git
     version: "0.29.2"

pubspec.yaml

@@ -67,7 +67,6 @@ dependencies:
   matrix:
     git:
       url: https://github.com/famedly/matrix-dart-sdk.git
-      ref: krille/store-upload-inbound-sessions-in-que
   native_imaging: ^0.1.0
   package_info_plus: ^6.0.0
   pasteboard: ^0.2.0