Add note about Yields else to README

README.md

@@ -93,6 +93,7 @@ While GlimmerX components accept `Args` as a type parameter, the Glint version a
 The `Element` field declares what type of element(s), if any, the component applies its passed `...attributes` to. This is often the component's root element. Tracking this type ensures any modifiers used on your component will be compatible with the DOM element(s) they're ultimately attached to. If no `Element` is specified, it will be a type error to set any HTML attributes when invoking your component.
 
 The `Yields` field specifies the names of any blocks the component yields to, as well as the type of any parameter(s) they'll receive. See the [Yieldable Named Blocks RFC] for further details.
+(Note that the `inverse` block is an alias for `else`. These should be defined in `Yields` as `else`, though `{{yield to="inverse"}}` will continue to work.)
 
 ```ts
 import Component from '@glint/environment-glimmerx/component';