build: replace @vueuse/head with @unhead/vue

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

src/views/PageNotFound.vue

@@ -55,7 +55,7 @@
   </section>
 </template>
 <script lang="ts" setup>
-import { useHead } from "@vueuse/head";
+import { useHead } from "@unhead/vue";
 import { computed, ref } from "vue";
 import { useI18n } from "vue-i18n";
 import { useRouter } from "vue-router";