Reword changelog to indicate performance concerns

Author: andreiborza

CHANGELOG.md

@@ -8,7 +8,7 @@
 
 - feat(cloudflare): Add `instrumentPrototypeMethods` option to instrument RPC methods for DurableObjects ([#17424](https://github.com/getsentry/sentry-javascript/pull/17424))
 
-By default, `Sentry.instrumentDurableObjectWithSentry` will not wrap any RPC methods on the prototype. To enable wrapping for RPC methods, set `instrumentPrototypeMethods` to `true` or a list of methods you want to instrument:
+By default, `Sentry.instrumentDurableObjectWithSentry` will not wrap any RPC methods on the prototype. To enable wrapping for RPC methods, set `instrumentPrototypeMethods` to `true` or, if performance is a concern, a list of only the methods you want to instrument:
 
 ```js
 class MyDurableObjectBase extends DurableObject<Env> {