Use FontAwesome as web font instead of vue component (#7469)

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* Update yarn.lock

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src/client/pages/not-found.vue

@@ -9,7 +9,6 @@
 
 <script lang="ts">
 import { defineComponent } from 'vue';
-import { faExclamationTriangle } from '@fortawesome/free-solid-svg-icons';
 import * as os from '@client/os';
 import * as symbols from '@client/symbols';
 
@@ -18,7 +17,7 @@ export default defineComponent({
 		return {
 			[symbols.PAGE_INFO]: {
 				title: this.$ts.notFound,
-				icon: faExclamationTriangle
+				icon: 'fas fa-exclamation-triangle'
 			},
 		}
 	},