[Electron] Fix path validation on typing in input box (#1708)

src/components/install/InstallLocationPicker.vue

@@ -16,7 +16,7 @@
             v-model="installPath"
             class="w-full"
             :class="{ 'p-invalid': pathError }"
-            @change="validatePath"
+            @update:modelValue="validatePath"
           />
           <InputIcon
             class="pi pi-info-circle"

src/components/install/MigrationPicker.vue

@@ -16,7 +16,7 @@
           placeholder="Select existing ComfyUI installation (optional)"
           class="flex-1"
           :class="{ 'p-invalid': pathError }"
-          @change="validateSource"
+          @update:modelValue="validateSource"
         />
         <Button icon="pi pi-folder" @click="browsePath" class="w-12" />
       </div>