docs: update rate limiting

Author: ace-of-aces

README.md

@@ -102,9 +102,9 @@ To force a revalidation, you can either:
 
 Another feature of this package is the ability to limit the number of transformations that the image transformation route should process per path and IP address within a given time frame.
 
-The rate limit will come into effect for new transformation requests only, and will not affect previously cached images. It is also only applied in the `production` environment.
+The rate limit will come into effect for new transformation requests only, and will not affect previously cached images.
 
-You can configure the rate limit settings in the `image-transform-url.php` configuration file.
+By default, rate limiting is disabled for the `local` and `testing` app environements to not distract you when developing your app. You can configure the rate limit settings in the `image-transform-url.php` configuration file.
 
 ## Usage with CDNs