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

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

src/components/Group/JoinGroupWithAccount.vue

@@ -16,7 +16,7 @@ import { useGroup } from "@/composition/apollo/group";
 import { displayName } from "@/types/actor";
 import { computed } from "vue";
 import { useI18n } from "vue-i18n";
-import { useHead } from "@vueuse/head";
+import { useHead } from "@unhead/vue";
 
 const props = defineProps<{
   preferredUsername: string;