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

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

src/views/CategoriesView.vue

@@ -103,7 +103,7 @@ import {
 import { useI18n } from "vue-i18n";
 import { useEventCategories } from "@/composition/apollo/config";
 import EmptyContent from "@/components/Utils/EmptyContent.vue";
-import { useHead } from "@vueuse/head";
+import { useHead } from "@unhead/vue";
 
 const { t } = useI18n({ useScope: "global" });