document caveat regarding query params

Author: lilnasy

packages/integrations/netlify/README.md

@@ -179,6 +179,8 @@ Astro.locals.netlify.builders.ttl = 45
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 ```
 
+It is important to note that On-demand Builders ignores query params when checking for cached pages. For example, if `example.com/?x=y` is cached, it will be served for `example.com/?a=b` (different query params) and `example.com/` (no query params) as well.
+
 
 ## Usage