update readme

README.md

@@ -1,9 +1,10 @@
 # openapi-scripts
+
 Scripts used in postprocessing OpenAPI document for ReDoc.
 
 ## Postprocess the JSON file generated by `bufbuild/buf`
 
-### dereference
+### Dereference
 
 Use [@apidevtools/json-schema-ref-parser](https://github.com/APIDevTools/json-schema-ref-parser) to dereference the auto-generated JSON file.
 
@@ -44,13 +45,13 @@ The default JSON generated by `bufbuild/buf` is:
 }
 ```
 
-### Import markdown files
+### Import Markdown files
 
 Embed external Markdown file contents to the `info.description` auto-generated JSON file. See [Redoc documentation](https://redocly.com/docs/api-reference-docs/guides/embedded-markdown/) for more information.
 
-### Add `x-logo`
+### Apply JSON patch
 
-[`x-logo`](https://github.com/Redocly/redoc/blob/master/docs/redoc-vendor-extensions.md#x-logo) is a [vendor extension](https://swagger.io/specification/#specificationExtensions) from Redoc. It allows you to show a custom logo on the left upper corner of your redoc output.
+Apply JSON patch to the auto-generated JSON file. See [RFC 6902](https://tools.ietf.org/html/rfc6902) for more information.
 
 ### Add tag group