📝 Update release notes

Author: tiangolo

docs/en/docs/release-notes.md

@@ -8,6 +8,7 @@
 
 * ✨ Add support for disabling the separation of input and output JSON Schemas in OpenAPI with Pydantic v2 with `separate_input_output_schemas=False`. PR [#10145](https://github.com/tiangolo/fastapi/pull/10145) by [@tiangolo](https://github.com/tiangolo).
     * New docs [Separate OpenAPI Schemas for Input and Output or Not](https://fastapi.tiangolo.com/how-to/separate-openapi-schemas/).
+    * This PR also includes a new setup (internal tools) for generating screenshots for the docs.
 
 ### Refactors