fix: remove unused string, rename string

src/app/components/contact-list/contact-list.html

@@ -1,10 +1,10 @@
 <div class="contact-list">
     <div class="contact-list__container">
-        <h2>{{strings.constacts|upperfirst}}</h2>
+        <h2>{{strings.contacts|upperfirst}}</h2>
         <app-contact-search-bar (contactSearch)="filter=$event"/>
         <app-counter 
             [count]="(this.contacts$|async)?.length ?? 0"
-            item="{{strings.constacts}}"
+            item="{{strings.contacts}}"
         />
         <app-contact-list-table [contactList]="(this.contacts$|async)|contactsFilter:filter"/>
     </div>