fix(material/list): Mat Selection List example is limited to html templating

Added a reactive forms example to the single selection list

Fixes #25894

Author: MichelleRetroRabbit

src/components-examples/material/list/list-single-selection-reactive-form/list-single-selection-reactive-form-example.ts

@@ -1,12 +1,13 @@
 import {Component} from '@angular/core';
 import {FormControl, FormGroup, FormsModule, ReactiveFormsModule} from '@angular/forms';
 import {MatListModule} from '@angular/material/list';
+
 interface Shoes {
   value: string;
   name: string;
 }
 /**
- * @title List with single selection using a reactive forms approach
+ * @title List with single selection using Reactive forms
  */
 @Component({
   selector: 'list-single-selection-reactive-form-example',