chore: Follow up update flutter matrix html

pubspec.lock

@@ -580,8 +580,8 @@ packages:
     dependency: "direct main"
     description:
       path: "."
-      ref: HEAD
+      ref: "krille/fix-trying-modify-unmodifiable-list"
-      resolved-ref: "81d8988584506d1eff0e28abd2a13af96fecb638"
+      resolved-ref: "201bd3322b6881da8128e60d49bd26a6af6eeda2"
       url: "https://github.com/Sorunome/flutter_matrix_html.git"
     source: git
     version: "1.1.0"

pubspec.yaml

@@ -146,7 +146,9 @@ dependency_overrides:
   # null safety
   flutter_math_fork: ">=0.7.0"
   flutter_matrix_html:
-    git: https://github.com/Sorunome/flutter_matrix_html.git
+    git:
+      url: https://github.com/Sorunome/flutter_matrix_html.git
+      ref: krille/fix-trying-modify-unmodifiable-list
   # fake secure storage plugin for Windows
   # See: https://gitlab.com/gitlab-com/gl-infra/reliability/-/issues/15161
   flutter_secure_storage_windows: