💚 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 pub global run dartdoc
 
   test_iOS:
     needs: analyze