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

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* Update yarn.lock

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src/client/pages/user/index.activity.vue

@@ -1,6 +1,6 @@
 <template>
 <MkContainer>
-	<template #header><Fa :icon="faChartBar" style="margin-right: 0.5em;"/>{{ $ts.activity }}</template>
+	<template #header><i class="fas fa-chart-bar" style="margin-right: 0.5em;"></i>{{ $ts.activity }}</template>
 
 	<div style="padding: 8px;">
 		<div ref="chart"></div>
@@ -11,7 +11,6 @@
 <script lang="ts">
 import { defineComponent } from 'vue';
 import ApexCharts from 'apexcharts';
-import { faChartBar } from '@fortawesome/free-solid-svg-icons';
 import * as os from '@client/os';
 import MkContainer from '@client/components/ui/container.vue';
 
@@ -35,7 +34,6 @@ export default defineComponent({
 			fetching: true,
 			data: [],
 			peak: null,
-			faChartBar,
 		};
 	},
 	mounted() {