💚 Try to fix dart doc

Author: AlexV525

.github/workflows/runnable.yml

@@ -47,7 +47,9 @@ jobs:
         run: dart pub publish --dry-run
       - name: Generate docs
         if: matrix.flutter-version != 'min'
-        run: dart doc --dry-run .
+        run: |
+          dart pub global activate dartdoc
+          dart doc --dry-run .
 
   test_iOS:
     needs: analyze

pubspec.yaml

@@ -37,6 +37,7 @@ dev_dependencies:
     sdk: flutter
   flutter_test:
     sdk: flutter
+  dartdoc: ^8.3.2 # https://github.com/dart-lang/dartdoc/issues/3947
 
 flutter:
   assets: