fix(components): missing relative imports

Resolves nuxt/ui#2515

src/runtime/components/Button.vue

@@ -46,6 +46,7 @@ import { useButtonGroup } from '../composables/useButtonGroup'
 import { omit } from '../utils'
 import { pickLinkProps } from '../utils/link'
 import UIcon from './Icon.vue'
+import UAvatar from './Avatar.vue'
 import ULink from './Link.vue'
 
 const props = defineProps<ButtonProps>()