[readme] notice about Rails

Author: 0exp

README.md

@@ -1,6 +1,6 @@
 # puma_after_reply · ![Gem Version](https://img.shields.io/gem/v/puma_after_reply) ![build](https://github.com/0exp/puma_after_reply/actions/workflows/build.yml/badge.svg??branch=master)
 
-Puma's `"rack.after_reply"` integration for your Rack-applications. Provides #call-able reply
+Puma's `"rack.after_reply"` integration for your `Rack-` and `Rails-`applications. Provides #call-able reply
 abstraction and configurable non-threaded/threaded invocation flow with before/on_error/after hooks for each added reply.
 
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