docs(CHANGELOG): polish enumerate_adapters-is-async section

Author: ErichDonGubler

CHANGELOG.md

@@ -40,18 +40,22 @@ Bottom level categories:
 
 ## Unreleased
 
-#### 'wgpu::Instance::enumerate_adapters` is now `async` & available on WebGPU
+### Major changes
 
-Making `enumerate_adapters` async allows custom backends to use it along with eliminating some native/non-native distinctions
+#### 'wgpu::Instance::enumerate_adapters` is now `async` & available on WebGPU
 
-This is a breaking change
+BREAKING CHANGE: `enumerate_adapters` is now `async`:
 
 ```diff
 - pub fn enumerate_adapters(&self, backends: Backends) -> Vec<Adapter> {
 + pub fn enumerate_adapters(&self, backends: Backends) -> impl Future<Output = Vec<Adapter>> {
-
 ```
 
+This yields two benefits:
+
+- This method is now implemented on non-native using the standard `Adapter::request_adapter(…)`, making `enumerate_adapters` a portable surface. This was previous a nontrivial pain point when an application wanted to do some of its own filtering of adapters.
+- This method can now be implemented in custom backends.
+
 By @R-Cramer4 in [#8230](https://github.com/gfx-rs/wgpu/pull/8230)
 
 #### `MipmapFilterMode` is split from `FilterMode`