Extend migration guide with ReqOverflow example.

docs/guides/migrating-from-specflow.md

@@ -106,6 +106,8 @@ If you run into any problems, it might be caused by the breaking changes between
 
 **Congratulations you are done!**
 
+Our more complex sample application, [ReqOverflow](https://github.com/reqnroll/Sample-ReqOverflow) has been also migrated from SpecFlow. You can check what changes we had to do in order to get it working with Reqnroll using the SpecFlow compatibility package. See the changes on [GitHub](https://github.com/reqnroll/Sample-ReqOverflow/compare/before-migration...migration-with-compatiblity-package).
+
 {#with-namespace-changes}
 ## Migrate with namespace changes
 
@@ -204,6 +206,8 @@ If you run into any problems that might be caused by the breaking changes betwee
 
 **Congratulations you are done!**
 
+Our more complex sample application, [ReqOverflow](https://github.com/reqnroll/Sample-ReqOverflow) has been also migrated from SpecFlow. You can check what changes we had to do in order to get it working with Reqnroll with a complete migration. See the changes on [GitHub](https://github.com/reqnroll/Sample-ReqOverflow/compare/before-migration...full-migration).
+
 {#breaking-changes-specflow-v3}
 ## Breaking changes since SpecFlow v3