docs: add link to lvalue info on `bind:` docs (#16008)

* add link to lvalue

* use more user-friendly info

documentation/docs/03-template-syntax/12-bind.md

@@ -4,7 +4,7 @@ title: bind:
 
 Data ordinarily flows down, from parent to child. The `bind:` directive allows data to flow the other way, from child to parent.
 
-The general syntax is `bind:property={expression}`, where `expression` is an _lvalue_ (i.e. a variable or an object property). When the expression is an identifier with the same name as the property, we can omit the expression — in other words these are equivalent:
+The general syntax is `bind:property={expression}`, where `expression` is an [_lvalue_](https://press.rebus.community/programmingfundamentals/chapter/lvalue-and-rvalue/) (i.e. a variable or an object property). When the expression is an identifier with the same name as the property, we can omit the expression — in other words these are equivalent:
 
 <!-- prettier-ignore -->
 ```svelte