Fix error with first_name label

src/views/SignUp.vue

@@ -27,7 +27,7 @@
           <hr class="divider">
           <div class="row g-2 align-items-center">
             <div class="col-3">
-              <label class="col-form-label required">{{ $t('words.lastname') }}</label>
+              <label class="col-form-label required">{{ $t('words.firstname') }}</label>
             </div>
             <div class="col">
               <ValidationProvider ref="first_name" rules="required" v-slot="{ classes, errors }">