Update README

ridgepole · Dec 18, 2021 · 5f48d2d · 5f48d2d
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@@ -17,6 +17,8 @@ It defines DB schema using [Rails DSL](http://guides.rubyonrails.org/migrations.
 * `DROP TABLE` is skipped by default in v1.0 and later versions.
   * If you want to `DROP TABLE`, please pass `--drop-table`.
   * cf. https://github.com/ridgepole/ridgepole/pull/363
+* In Rails 7.0, the output of dumper is different from Rails 6.
+  cf. https://github.com/rails/rails/issues/43909
 
 ## Installation