Clarify automatic caching applies to all selector functions

Updated section title and content to make clear that automatic
caching with allowObservableChange applies to all watch functions
with selector parameters (watchValue, watchStream, watchFuture, etc.),
not just watchValue().

Author: escamoteur

docs/documentation/watch_it/watching_multiple_values.md

@@ -146,10 +146,10 @@ class SettingsWidget extends WatchingWidget {
 
 **Key benefit:** Rebuilds only when `s.darkMode` **value** changes, ignoring notifications about other property changes.
 
-## Safety: Automatic Caching with allowObservableChange
+## Safety: Automatic Caching in Selector Functions
 
 ::: tip Safe to Use Operators in Selectors
-You can safely use `listen_it` operators like `combineLatest()` inside your `watchValue()` selector function. The default `allowObservableChange: false` ensures the operator chain is created once and cached.
+You can safely use `listen_it` operators like `combineLatest()` inside selector functions of `watchValue()`, `watchStream()`, `watchFuture()`, and other watch functions. The default `allowObservableChange: false` ensures the operator chain is created once and cached.
 :::
 
 <<< @/../code_samples/lib/watch_it/multiple_values_inline_combine_safe.dart#safe_inline_combine