docs: swap the anchor to the correct one (angular#61200)

The anchor on the link - is not working, swap the anchor to the correct one
PR Close angular#61200

Author: vladboisa

adev/src/content/guide/templates/variables.md

@@ -138,7 +138,7 @@ If you declare the variable on a Angular component, the variable refers to the c
 <my-datepicker #startDate />
 ```
 
-If you declare the variable on an `<ng-template>` element, the variable refers to a TemplateRef instance which represents the template. For more information, see [How Angular uses the asterisk, \*, syntax](/guide/directives/structural-directives#asterisk) in [Structural directives](/guide/directives/structural-directives).
+If you declare the variable on an `<ng-template>` element, the variable refers to a TemplateRef instance which represents the template. For more information, see [How Angular uses the asterisk, \*, syntax](/guide/directives/structural-directives#structural-directive-shorthand) in [Structural directives](/guide/directives/structural-directives).
 
 ```angular-html
 <!-- The `myFragment` variable is assigned the `TemplateRef` instance corresponding to this template fragment. -->